What would you put in a J20??? - JeepForum.com

 
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post #1 of 9 Old 01-17-2014, 06:33 AM Thread Starter
BigBlue9044
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1959 CJ5 
 
Join Date: Jan 2012
Location: Eden
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What would you put in a J20???

I'll be picking up an '84 J20 in a couple weeks that's in pretty solid shape. My goal is to use it as a bit of a toy but mostly a tow vehicle for my wife's horses. Planning on doing a flatbed with a 5th wheel. It's set up now with a D44 front and D60 rear but other than that, the running gear is MIA.

With that said, I'm thinking a 6bt if I can find one that's reasonably priced (under $2k) but other than that I'm looking for some thoughts or opinions.


'59 CJ5 w/ Ford 302, T-98, Dana 18 twin stick, Detroit Tru Trac Dana 30 (disc brakes!!!), Dana 44 3.92's, Saginaw swapped, power brakes and hydro clutch. Built-not-bought.
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post #2 of 9 Old 01-17-2014, 08:10 AM
strvger01
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1966 CJ5 
 
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yep, i'd go with the dodge 5.9L for sure. the early models, 1989-1998 will be the cheapest most likely. and the 12v doesn't need glow plugs for cold starts. good luck with your build, and don't forget pics!

1966 CJ5A, mods are coming
1966 Wagoneer, bone stock
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post #3 of 9 Old 01-17-2014, 08:26 AM
CSP
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J-truck with Cummins build thread: http://www.pirate4x4.com/forum/tow-r...kes-build.html
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post #4 of 9 Old 01-17-2014, 07:51 PM
JrTjK
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1978 FSJ Wagoneer 
 
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I'd vote for a Chevy 6.0/4l80.
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post #5 of 9 Old 01-18-2014, 09:15 AM
pcoplin
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Towing? I'd do a 6BT for sure.

If it's a just a driver, I;d do a Dodge 5.2/5.9 or a Chevy 5.3.
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post #6 of 9 Old 01-19-2014, 10:43 AM
super98lsc
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Nothing will beat a diesel for towing and economy. The cummins would be hard to beat. I can say if your wanting to go the gasser route the GM 6.0 4l80e is a tough combo but will suck fuel under load around 6-9 mpg depending on winds,hills etc. No load it will get 20 ish. I leased a Penske truck with a 6.0 and the new 6spd version of the 4l80e that truck averaged 8-10 on flat interstate pulling a tandem axle car hauler with a 4 door accord on it. Never ran hot never used oil and had no issues passing traffic @ 65-75 it would go faster (not smart) but the governor shuts it down at 79. I was impressed with the power and mileage for a gas engine. I'm building a built 401 & 4l80e for my Wagoneer while I know the 401 will make more torque and hp it will not get the economy of the new LS.

www.mangierisrc.com
06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
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post #7 of 9 Old 01-19-2014, 10:44 AM
super98lsc
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Also the 4l80e has a very low 1st gear which helps get it rolling easier :-)

www.mangierisrc.com
06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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post #8 of 9 Old 01-21-2014, 01:14 PM
sandman_rides
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I happen to have a GMC Grumman utility truck with a 6BT and an Allison 3-speed automatic that might fit the bill nicely, has less than 75k miles on it... You'd have to get an adaptor for your transfer case, and maybe do a body lift... I was looking at doing the same thing for my Chief, but I hate to ditch the original engine and transmission... The truck is in Michigan, so not too awful far from you.
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post #9 of 9 Old 01-23-2014, 12:46 PM
462FSJ
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1973 J-Series Truck 
 
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Big block I have has plenty of pulling power but if I were to go diesel is definitely take the 6bt
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