Putting a 350 from 75 Malibu into my wheeler, which I also drive on the street occasionally, keeping it stock, except for hedders, Hei distributor/coil, It has an automatic

It has a stock 4 barrel carb on it which i never saw, wondering what would be a good brand/size to replace it with, trail performance is the priority, Seems like there is a lot of carbs in the summit cat for 200-300 bucks.

would I gain much by going with an aftermarket aluminum intake and new carb as well, i dont want a hot rod, I want a wheeler with a lot of torque and all around performance.

any suggestions?

EFI





or Weiand Stealth / Performer intake w/ Q-jet.

IMO, there is only 1 carb worth considering off-road, and that's a q-jet. All the rest, even if they have the "off-road kit" will flood and stall long before the q-jet. I hear that the Holley off road carb (whatever its called) is a runner up, but still not a match for the stock q-jet. And being a spread bore, it works well from low rpm to high. It's really a great carb that provides great performance and tune-ability on and off the road.

But no carb can match EFI. For the max off-road capability, with some sacrifices in potential max performance (usually not an issue), you can go with TBI relatively easily. Other EFI options are more trouble and expense, but gain back some of the performance to match or exceed a stock q-jet.

Edlebrock dual plane performer intake is hard to beat for cost/value. And you can run TBI on one with a 454 (or aftermarket) TBI adapter. I just use a stock TBI intake on both of mine.

wowuld love to go with TBI, just more work and expense that i want right now

what size Q-jet do you reccommend?

hows the stock manifold, will I gain anything with an edelbrock?

Qjets were 750 or 800 cfm. It doesnt really matter much, just get an older one. You dont want one from an emmissioned vehicle, and they even had computer controlled qjets. The edelbrock made qjets are pretty nice and highly recommended. I'd get an older one and rebuild it with a couple mods, but I switched to EFI on one truck and a Holley 850 DP Blower carb on the other, so you'll have to read up on qjet mods.

The stock iron intakes suck. I prefer the Weiand Stealth intakes myself, theres nothing wrong with Edelbrocks, though. Definately get rid of the stock intake.

Rebuild a Q-Jet or Jegs and Summit sell rebuilt Q-Jets. Or go with the Holley truck avenger in the 600 CFM range. As for manifolds, if everything else is stock except maybe headers, grab an Edelbrock Performer. Less weight, more HP, and better fuel efficiency. I ran a Edelbrock Q-Jet with the Performer manifold and headers with MSD ignition for a while in a Blazer and it worked pretty good. The "regualr" Holley's and Edelbrock carbs will not be fun offroad. Had the Edelbrock 600CFM for a short time. Whenever I was on any incline it would sputter and die. Stuff I would run in 2 wheel drive the carb couldnt take.

Probably don't need anything bigger than a 600...

I run an edelbrock performer and only had issues with it when I'd bounce the front end... during my last rebuild on it, I put in the spring loaded needle kit and it hasn't had any stalling at all, even on inclines...

I don't do a whole lot of off-cambered stuff though, mostly just street and hunting/ranch trails with it...

I run an 800 cfm Q-jet on top of a Performer RPM intake, Extreme Energy 268H cam w/ matching Comp Cams valvetrain and springs, headers and duals on my 400 sb. I ordered the carb from Jet and when I did they told me that the 800s were used on trucks and the 750s were used on cars. As far as I know, those were the only two different flow ratings available on the Q-jet although there were MANY different variations/calibrations among the different applications/years. For what it's worth, I've had nothing but misery since I swapped my worn out stock 800 for the rebuilt/recalibrated Jet carb, but that's another story...

As far as intakes, the different car mags have done about 10 million comparisons between the Performer and the RPM, and in pretty much every article I've ever seen, the RPM KILLED the Performer upstairs without giving ANYTHING up at low speed. I can tell you that my set-up makes way more low end grunt than it ever did before, and the difference on the top end is nothing short of astonishing. Of course I've got the whole intake/cam/exaust package going, but even stock, my money would still be on the RPM purely from a performance standpoint.

But then I'm a hot-rodder and don't do much idling around. My truck serves double duty as 4X4 and hot rod...so it's your call.

I ran an old Holley (1850, 600CFM I think), on an Edlbrock and headers in my Blazer and it really woke the motor up compared to stock. Ran a vent hose between the carb vents and didn't have problems on inclines.

When I built my blown 496 BBC, I ditched the q-jet for several reasons. I got a Holley 850 DP, custom built for me by AED.

http://www.aedperformance.com/ Check out the "super modified" carbs

It was calibrated for my motor, modified for the blower, and is ported with the choke horn milled and a billet baseplate. Expensive, but awesome for a hotrod motor. After several thousand miles, its still a rush to open the secondaries. If youre looking for max performance, people have been sucessfull running them off road with a couple mods.

JRPYJ, you might want to try running a tee from the line going between the vent tubes to a catch can outside the airfilter assembly, in case it really needs to vent. This may prevent gas from pushing past seals if its ever a problem for you.

There is a vendor on eBay called 'remancarb' who has an eBay store. They are located in Texas and sell rebuilt Quadrajets. I am in no way affiliated but bought from them and had a good experience. You can get a very nicely rebuilt q-jet, including the intake gasket and air cleaner gasket and epoxied for around $200 shipped to your door ready to run. They sell year-specific if you want to be that precise and I found that the numbers on the carb body indeed matched up with what they claimed it was.

Hope that helps.

IMO, there is only 1 carb worth considering off-road, and that's a q-jet. All the rest, even if they have the "off-road kit" will flood and stall long before the q-jet. I hear that the Holley off road carb (whatever its called) is a runner up, but still not a match for the stock q-jet. And being a spread bore, it works well from low rpm to high. It's really a great carb that provides great performance and tune-ability on and off the road.

But no carb can match EFI. For the max off-road capability, with some sacrifices in potential max performance (usually not an issue), you can go with TBI relatively easily. Other EFI options are more trouble and expense, but gain back some of the performance to match or exceed a stock q-jet.

Edlebrock dual plane performer intake is hard to beat for cost/value. And you can run TBI on one with a 454 (or aftermarket) TBI adapter. I just use a stock TBI intake on both of mine.
I put a Edelbrock Air Gap intake and a Holley Truck Avenger carb on my 454, ran great out of the box, the nice thing about the Truck Avenger vs the Qjet is that there is no bog between primary and secondary openings, and the Avenger works great in 45 degree + hillsides without stalling. Also cool is that the Avenger comes in smaller CFM sizes (my 454 has a 670 cfm model) and gets slightly better fuel mileage than the Qjet

the trick sbc street intake used to be the Weiand 8004.
I wouldn't put an Edelbrock Performer on anything.

Q-jet is the only offroad carb that works

I can't really comment much on the intakes since I've been out of performance builds for a VERY long time. "Back in the day" Edel was a good intake for the money, but I've heard a few folks really down on them in the last few years, so maybe the quality dropped, or just random bad experience. Why is Edel so bad other than typical trade-offs of a budget perf piece?

As for the legendary "quadra-bog", that is a common feature of all spread bores, but only happens when they are worn, damaged, or worked on by someone who does not know what they are doing. You can delay the secondaries, change their rate, change the jets, tweak the feed holes, and all sorts of things to get them working just like you want. The CFM thing is also a wild hearing since the q-jet is one of the most efficient mixers out there and, short of having mechanical or tune problems, you won't get any better mileage out of any square bore.

9 times out of 10 the bog is a bad accel pump.
a performer intake is no better then a stock 4bbl intake.
the Victor is a fine item, but for my current build I am using a weiand Xcellerator as it has the alternator mount that matches my current accesory brackets (changed them 3 times and do not want to do it again)

stay away from the edelbrock carbs JJJJJJUUUUUNNNNNNKKKKKK Q-jet the way to go if you need a 600 go 700 always go bigger you can jet down and have room for going up
MY .02

you cannot 'jet down' the cfm.
remember air fuel is a ratio, the carb sees so much air and adds a proportionate amount of fuel.
jetting should not need to be changed much if at all

I put a Edelbrock Air Gap intake and a Holley Truck Avenger carb on my 454, ran great out of the box, the nice thing about the Truck Avenger vs the Qjet is that there is no bog between primary and secondary openings, and the Avenger works great in 45 degree + hillsides without stalling. Also cool is that the Avenger comes in smaller CFM sizes (my 454 has a 670 cfm model) and gets slightly better fuel mileage than the Qjet

Another vote for the TruckAvenger especially if your on an incline or hillside, NO STALLING what-so-ever.
I'm a n00b compared to most around this site but this is the advice I was given by people who have decades of knowledge. No regrets with the AVENGER :smokin:

Go with fuel injection. That being told....

Holley Truck Avenger 670 carb
Edelbrock Performer RPM manifold and cam

I ran that for about a year until I sold my truck. Awesome (if you dont care about gas mileage :D )