Overhauling 80 CJ-7 with a 4.5BT Cummins - JeepForum.com
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post #1 of 61 Old 05-06-2012, 07:59 PM Thread Starter
Dre40
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Overhauling 80 CJ-7 with a 4.5BT Cummins

Well I'm starting a thread on my 79 CJ-7 that I have had for probably 3 years now. I have already tour it down to the frame. the tub was Swiss cheese so I scraped it and was able to get a 80 CJ-7 tub that was in better shape. Now it will need some work but not as bad as the original tub. I also got axles out of a 79 Blazer a D44 and GM12 bolt. Now the question I have is do I keep it as a leaf spring rig or do I go with a four link coil over? What do you guys think? pros and cons of both?
Originally I was going to use a chevy 350 four bolt main engine I have as the power plant. but I was able to get a hold of a 4.5BT Cummins engine my work was scraping it was brand new never used.so I'm going that way now.

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post #2 of 61 Old 05-06-2012, 08:02 PM
Trapshooter
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Wow.....that's a heck of a project. Best of luck getting it all together.

'86 CJ7, 258, Carter BBD, Nutter'ed, TeamRush'ed, T-18, Twin Sticked Dana 300, D30 Frt-Pwr Lok L/S-4.10, AMC 20 Rear-Mosers-Detroit Locker-4.10, 2.5 BDS Lift, 1" Body Lift, 33" Wild Country M/Ts, Black Spoke wheels

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post #3 of 61 Old 05-06-2012, 08:07 PM
kw89425
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Best of luck good project..but if your going to do all that work i wouldnt use a c clip rearend. Just sayin

86 cj7 496 powered 465/205 ton axles 38.5 boggers

http://www.jeepforum.com/forum/f8/my...oject-1019388/
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post #4 of 61 Old 05-06-2012, 08:15 PM
jakeryii
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94 ZJ 4.0, np 249 on 31x10.50s no lift
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post #5 of 61 Old 05-06-2012, 08:43 PM
levergun
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Garage
Give me the engine. That's the solution. It will save you do much time and energy!!

1979 CJ5 408 AMC dana 60/14b, T18, d300, PSC hydro assist
1948 Willys CJ2a LS 4.8/sm465 scout 44's
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post #6 of 61 Old 05-06-2012, 10:20 PM
Shiftace
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Quote:
Originally Posted by Dre40 View Post
...but I was able to get a hold of a 4.5BT Cummins engine my work was scraping it was brand new never used.so I'm going that way now.
OH, SHUT UP!


Quote:
Originally Posted by gpets View Post
...it is perfectly acceptable to take a sawzall to anything you can't figure out, that is how we all learn.

http://www.funnyordie.com/articles/3...-end-the-world
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post #7 of 61 Old 05-06-2012, 10:37 PM
RenoF250
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I think the only disadvantage to a four link is the work/cost.

What are you planning to use for a transmission?
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post #8 of 61 Old 05-06-2012, 10:41 PM
RobsCrawlin7
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got anymore of those motors laying around for me?!

stay leaf, if you want coil, get a tj.

'01 TJ 4.7/NV3550, 2" lift, 35's, locked.
'79 CJ7 stock, 304
'98 XJ sold
'79 CJ7 sold
'82 CJ7 parted
'89 MJ sold

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post #9 of 61 Old 05-07-2012, 09:46 AM Thread Starter
Dre40
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Well I'm going to use a SM-465 that I already have. as far as the rear end goes I got the GM12 bolt I would prefer another axle but not sure what. would love to find a set of D60 but that's allot of $$. How would a Ford 9" be would that be a better axle? we had a few other engines but they where perkins this was the only Cummins.
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post #10 of 61 Old 05-07-2012, 09:50 AM
kw89425
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Quote:
Originally Posted by Dre40
Well I'm going to use a SM-465 that I already have. as far as the rear end goes I got the GM12 bolt I would prefer another axle but not sure what. would love to find a set of D60 but that's allot of $$. How would a Ford 9" be would that be a better axle? we had a few other engines but they where perkins this was the only Cummins.
14 bolt is hard to beat they are in so many different things easy to find. They can be bought from $50 to $100 around me. I got one for $25 once. Not that high to disc brake them either.

86 cj7 496 powered 465/205 ton axles 38.5 boggers

http://www.jeepforum.com/forum/f8/my...oject-1019388/
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post #11 of 61 Old 05-07-2012, 09:50 AM
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post #12 of 61 Old 05-07-2012, 10:53 AM Thread Starter
Dre40
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I would like a 14 bolt. what vehicle are they in so I can start my hunt?

They are all scraped already.. ..
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post #13 of 61 Old 05-07-2012, 01:17 PM
kw89425
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Quote:
Originally Posted by Dre40
I would like a 14 bolt. what vehicle are they in so I can start my hunt?

They are all scraped already.. ..
Just about any 3/4 ton trucks vans box trucks

86 cj7 496 powered 465/205 ton axles 38.5 boggers

http://www.jeepforum.com/forum/f8/my...oject-1019388/
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post #14 of 61 Old 05-07-2012, 01:21 PM
B2E
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TONS of info for the 14 bolt. enjoy!

http://www.pirate4x4.com/tech/billav...ble/index.html
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post #15 of 61 Old 05-07-2012, 01:24 PM
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Quote:
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.........but I was able to get a hold of a 4.5BT Cummins engine my work was scraping it was brand new never used.so I'm going that way now.
If you got that engine for free then......Congratulations!!!!!! you've just become my new most hated member on JF.....followed closely in 2nd by Scott21 and his barn find CJ7....

'84 CJ-7: Yota axles (spartan locked front, e-locked rear) 4" BDS, 1" Daystar & 3/8" shackle lifts, 35" X-Terrains on steelies, YJ Tub & family roll bar, heater blower upgrade, 4.2L w/MC2100 & Team Rush, Warn 8274. Rebuilt 4.2/4.0 hybrid, AX15 and twin sticks/clocking ring waiting to go in.

The advertised position for a topless, dirty jeep girl has been filled......by my wife. Thanks to all that applied.
<------------and yes, that is her.
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