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Old 11-02-2013, 05:37 AM   #1 (permalink)
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Middy-Strength BJ73 comp truck

G'day guys. I thought I'd throw my build up on pbb to get some different opions on stuff that I'm doing with my Cruiser. Its a bit of a long story so i wont bother with that too much but basically I've had the car for over 4 years and in that time its had a couple of transformations. The Cruiser is now in what I can only imagine will be its last transformation.

Here is the build thread from the start if anyone is interested, you should be able to see it without joining the forum- View topic - middy strength-bj73 | Australian 4WD Action

The new direction for the build is more for the U4 style of racing, there is a series starting up over here next year.
Specs are:
BJ73 MWB wagon body and chassis chopped up to buggery
LS1- good tune and some valves springs
TH400- fully manual
Atlas 2 speed, 3.8:1
Dana 70B Rear
Chevy Dana 60 LP front
37" creepy crawlers but will look at running bigger tires for comps that allow it.

Here is a photo of what it looked like when I bought it.


Version 1


Version 2




I ran it like that for a while with mods here and there until easter this year where I pretty much pulled everything off the car and started again.


Initial tear down





This is how it's sitting now, it is mocked up at full compression and should have a ride height of 550mm (22"). The drive train is all in the car and now I just need to make it work. I'll just update this thread now as I go.


Cheers, Rob
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Old 11-02-2013, 07:58 PM   #2 (permalink)
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just curious as to what a LS1 goes for in australia?
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Old 11-02-2013, 08:23 PM   #3 (permalink)
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i'll be watching this!
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Old 11-02-2013, 09:01 PM   #4 (permalink)
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Depending on mileage and what accessories come with it but between $1500 and $2500. I paid $2000 for my one out of a 2004 commodore with 140,000 km on it, that's about 90,000 miles and out dollar is about the same as the USD at the moment.
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Old 11-02-2013, 09:08 PM   #5 (permalink)
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talk to me about a commodre.
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Old 11-02-2013, 11:12 PM   #6 (permalink)
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Quote:
Originally Posted by 77WarPig View Post
talk to me about a commodre.
Holden Commodore - Wikipedia, the free encyclopedia

They are an Australian made car with various models and engines, sedan, wagon or ute with a V6 or a V8. Holden is a part of GM and the current ponitacs are essentially the same car as our Holdens.
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Old 11-02-2013, 11:21 PM   #7 (permalink)
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excellent. hijack completed, continue with the build that im sure more than a few of us will be watching!
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Old 11-02-2013, 11:27 PM   #8 (permalink)
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No worries. I got the transmission crossmember done today, it turned out ok. I managed to reuse the first set of engine mounts I had so it uses the same bushes and I will use the same bushed for the transfer case output support.





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Old 11-02-2013, 11:33 PM   #9 (permalink)
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the pic of the engine mount in your first or second post looks like the engine is solid mounted? is it solid or is there a bushing? cuz one here and not on there wont work out too well!

the crossmember looks badass BTW

Last edited by 77WarPig; 11-02-2013 at 11:34 PM.
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Old 11-02-2013, 11:35 PM   #10 (permalink)
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The front is bushed, using the same bushes I have in the tranny mount. I'm using a nissan patrol control arm bush.
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Old 11-02-2013, 11:44 PM   #11 (permalink)
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right on man. i crammed an LS into my cruiser a while back, and i solid mounted everything. it obviously transfers a little more vibration than a rig with bushings, but as a dedicated wheeler i was not too worried about it. im pumped to see this thing done, its gonna have some zip thats for sure. you ever weigh it?
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Old 11-03-2013, 12:20 AM   #12 (permalink)
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Cheers mate, Im pretty sure I'll run out of talent and balls before I run out of speed. I weighed it when I finished building version 2 and it came in at just over 2200kg from memory which is about 4900lb, that was with no people in the car.. I'm hoping that it will be around that weight or maybe a bit less when I'm finished. I've added a lot of weight with the axles but I've lost weight by going to the LS1 from the cast iron blocked 308 I had in it previously plus the weight lost by chopping the back of the body off too.
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Old 11-03-2013, 08:18 AM   #13 (permalink)
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Looks like a cool build.
Is U4 style more popular on the east or west side of the continent. And where is Mackay?
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Old 11-03-2013, 10:46 AM   #14 (permalink)
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It's pretty popular on both sides, but the east coast is much more populated. Mackay is in North Queensland, probably the most sothern point of what is considered the tropics.
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Old 11-05-2013, 02:08 PM   #15 (permalink)
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Added this to the build thread.
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Old 11-05-2013, 02:51 PM   #16 (permalink)
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Cheers mate.
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Old 11-06-2013, 07:31 AM   #17 (permalink)
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U4 is popular on both sides but all that style comps are in the east. Us western knuckle draggers are only just scratching together a rule set after way too many years with pretty much nothing to build for. We held a rock racing comp last month that has gotten the juices flowing again though, it made me pull my finger out and build again, will post once it resembles more then a fj55 with 1/2 a chassis a bunch of junkyard springs and a seized 351windsor...

loving the mwb bud, I always thought one would make a good ultra4 type thing
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Old 11-20-2013, 01:37 AM   #18 (permalink)
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Ive had a bit of a quiet week at work this week so it has given me a chance to get some work done on the 'Cruiser. I have skinned the dash, center console, and back wall, I have also mounted the all the shifters and brake levers.








I also added some grab handles to help with getting in and out of the suspension seats.
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Old 11-20-2013, 06:56 AM   #19 (permalink)
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ive already learned 3 things from this thread.


keep the updates coming
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Old 11-20-2013, 01:47 PM   #20 (permalink)
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Haha, I hope those three things are useful?
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Old 11-21-2013, 02:52 AM   #21 (permalink)
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Got most of the steering mocked up today,







These were my helpers today. They weren't very helpful.


This is the link that goes from the steering arm, I V'ed it out to get a good weld in there because I want to make sure it's strong. Any tips on the process I should use? I was thinking of doing 3 passes with the TIG using a 1.6mm tungsten and 1.6mm filler. Would that be ok? Any other suggestions?
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Old 11-21-2013, 08:03 PM   #22 (permalink)
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from the steering arm to where?
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Old 11-22-2013, 01:15 AM   #23 (permalink)
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Haha, yeah sorry. steering arm to hydro ram. I welded it up today anyway.
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Old 11-22-2013, 06:50 PM   #24 (permalink)
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how bout a picture of the aforementioned set up. usally theres some threads in there somwheres for adjusting shits.
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Old 11-22-2013, 09:04 PM   #25 (permalink)
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Sorry what do you want a picture of? The steering link?
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