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Old 09-01-2012, 01:19 PM   #1 (permalink)
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Mud Truck Build

This is going to be my first mud truck build. I recently got a 1975 Dodge W100 with a 1978 440 in it has Edelbrock 600cfm carb and a Edelbrock streetmaster intake. I want to get as much torque out of it i can without dropping a ton of cash into it. Any Suggestions? The truck is just going to be used for some trail but mostly mudding at the local mudfest and will not be drove on the street. I have a set of out the hood headers just laying around i figure i will put on. I can get a Lunati Voodoo 250/256 hyd cam for basically nothing as well as a gear drive timing set. Would that be worth doing or should i go a different direction? It has stock 1/2 ton axles and 35x12.50 tires and will have until i break a axle then i will upgrade to 3/4 ton so im not going to regear the stock axles. The bed is going to be removed and front fenders chopped to eventually fit some 40" tires. Any input would be appreciated being as i am new to this. Throw in any suggestions.
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Old 09-01-2012, 06:06 PM   #2 (permalink)
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those 1/2 tons bring the suck on a healty 440. get tons or better.
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Old 09-01-2012, 07:28 PM   #3 (permalink)
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Pretty good Mud Section on here. One post also has stuff on other sites.
Allways liked playin in the mud myself. Makes for a lot of maintenance though.
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Old 09-02-2012, 06:43 AM   #4 (permalink)
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What are your thoughts on a Dana 60 rear or 14 bolt and what gear selection if i run a 40" to 44" tire? I'm not wanting to run rockwells just yet that may be in the distant future.

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Old 09-02-2012, 01:07 PM   #5 (permalink)
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What are your thoughts on a Dana 60 rear or 14 bolt and what gear selection if i run a 40" to 44" tire? I'm not wanting to run rockwells just yet that may be in the distant future.

Go 35 spline chromos in a rear 60 and use a 5 somthing gear. That should make you happy. and not break a shaft. pinion is another story. 14 bolt is stronger. Chromos would make it damn strong. plus they have a bigger pinion than the 60 when you get up in the 5's on your ratio.
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Old 09-02-2012, 03:13 PM   #6 (permalink)
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Go 35 spline chromos in a rear 60 and use a 5 somthing gear. That should make you happy. and not break a shaft. pinion is another story. 14 bolt is stronger. Chromos would make it damn strong. plus they have a bigger pinion than the 60 when you get up in the 5's on your ratio.
You're really trying to tell this guy to blow a shit ton of money on a rear D60? When a stock 14bolt will NEVER break in the mud.
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Old 09-02-2012, 04:12 PM   #7 (permalink)
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what your saying is to just go with a stock 14 bolt?
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Old 09-02-2012, 04:16 PM   #8 (permalink)
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14 bolt stock is plenty strong , cams make a nice difference , look yours up and see
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Old 09-02-2012, 04:25 PM   #9 (permalink)
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what your saying is to just go with a stock 14 bolt?
Yeah.
But more importantly, do some research.
The torque of a big block is gonna rip that d44 to pieces. I forsee c-clips breaking in the 9 1/4.
If you are going with a 40in tire, you're gonna have to upgrade to 1 ton axles, unless you feel like breaking and wasting money, and 4.10 gears are PLENTY, with the 440.

You're gonna regret the headers coming out of the hood. And everyone else is gonna get annoyed with them anyways..

'78 440's, according to the books, only make 250hp and 400 lbs torque. Which is still plenty, but with a small cam, headers and some 906 heads, you can get 350 horse and tonss of torque no problem.

All in short... 1 ton it, lockers, and you'll have a badass mud truck.
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Old 09-02-2012, 04:39 PM   #10 (permalink)
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Sweet thanks for the input i know the d44 wouldn't last long.
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Old 09-02-2012, 07:01 PM   #11 (permalink)
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44 might last a bit in the mud. Probably not long on the trail.

Build a 14 bolt or a 70 with a locker and beat it. 60 front.

4.10s might work in the mud with 40"+ tires but it might suck on the trail.

Maybe 4.56, 4.88s your 440 should turn em. Might be to deep of gear for the pit though, definitely help on the trail.

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Old 09-02-2012, 07:48 PM   #12 (permalink)
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Yeah.
Sense. This guy speaks it.
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Old 09-02-2012, 07:51 PM   #13 (permalink)
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I guess it depends if he keeps the 44 open ha.
My mildly built 360 pulls 39.5x18in cut out boggers like nothing. I'm sure a 440 has plenty
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Old 09-02-2012, 10:40 PM   #14 (permalink)
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You're really trying to tell this guy to blow a shit ton of money on a rear D60? When a stock 14bolt will NEVER break in the mud.
It was just an option haha.. i agree 14 bolt is the way to go.
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Old 09-05-2012, 09:11 AM   #15 (permalink)
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'78 440's, according to the books, only make 250hp and 400 lbs torque. Which is still plenty, but with a small cam, headers and some 906 heads, you can get 350 horse and tonss of torque no problem.

All in short... 1 ton it, lockers, and you'll have a badass mud truck.
I agree with the above with one exception. Open chamber big block heads are all basically the same from '70 on. Swapping your 452s for 906s wouldn't net any power, and would actually be a step backward since they don't have hardened exhaust seats.
Travis..
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Old 09-05-2012, 11:45 AM   #16 (permalink)
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I agree with the above with one exception. Open chamber big block heads are all basically the same from '70 on. Swapping your 452s for 906s wouldn't net any power, and would actually be a step backward since they don't have hardened exhaust seats.
Travis..
The '78 440's had 902 heads, I'm pretty sure. 452 heads were in the earlier 440's I thought? I could be mistaken, cuz I'm a small block guy, but I thought the 902's were the small heads, 906's had the bigger valves while the 452 had the bigger ports?
Learned me away haha
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