Ls swap? ??

For everything related to using Fuel Injection in an FSJ.
Bigpete1
Posts: 3
Joined: Tue Aug 09, 2016 10:33 pm
Location: Escondido, CA

Ls swap? ??

Postby Bigpete1 » Tue Aug 30, 2016 9:45 pm

Hello. Just wondering if anyone has done a ls swap out ?? If so would the stock axles from a 73 wag. Be able to handle the power? ? Given that they line up right and all. And any companies make motor mount adapters for FSJs.
T.I.A :fsj: :fsj:

User avatar
REDONE
Posts: 2563
Joined: Tue Sep 13, 2011 5:48 pm
Location: Lakewood and Bailey, CO

Re: Ls swap? ??

Postby REDONE » Tue Aug 30, 2016 9:56 pm

Um... there's been a lot of LS swaps, there's a solid handful of companies that make motor mounts, radiators and adapter plates depending on how much you want to change. BUT a 73 FSJ will have passenger drop front axle, and all the transmission and transfer case combinations that came behind the LS were all drivers drop, so they don't line up at all. As for how they handle the "power", that depends entirely on what you plan to do with it. 31"s and feather footing through the backwoods? No problem. 10" of lift, 39"s and blasting mud bogs? Might need rockwells.
79 J-10 (The Money Badger) KE0LSU
304/Performance Fuel Injection TBI/MTA1/SP2P/Magnum rockers
T18/D20/D44s/33" Mud Claws
Grizzly Locker Rear
4" front spring drop, 5" rear shackle flip
Chevy style HEI (ECM controlled)
Dolphin "Shark" gauges in a fancy homemade oak bezel
3/4 resto, rotting faster than I've been fixing it.

GaJeep94YJ
Posts: 313
Joined: Fri Dec 18, 2015 12:00 pm

Re: Ls swap? ??

Postby GaJeep94YJ » Wed Aug 31, 2016 8:22 am

My 79 lines up fine....

You need to get a 231c that's a passenger side drop.

Or do like I did and convert a 2wd 4l60e into 4wd and use a Dana 300. Adapter has the vss in there which helps with the 4wd speeds in huge PCM.

Bolt in motor mounts are $100. Use the stock jeep cross member in the rear holes

Sent from my Nexus 5 using Tapatalk

Blake
Moderator
Posts: 3077
Joined: Sat Aug 27, 2011 10:26 am
Location: Off the grid on Storm Mountain Colorado
Contact:

Re: Ls swap? ??

Postby Blake » Wed Aug 31, 2016 8:25 am

You probably want to look at the build threads in here (there is a section for them) in addition to searching.

I don't think the stock axles would hold up very well, but it all depends. I have severe issue with semi-float drum brake axles to begin with, so I always recommend full float. But if you baby the stock axles, they may work just fine.

FSJ Guy
Posts: 1763
Joined: Fri Mar 15, 2013 3:03 pm

Re: Ls swap? ??

Postby FSJ Guy » Wed Aug 31, 2016 11:06 pm

If you don't drive like Blake, you may be fine.

:- p

Seriously, however, yes, if you go easy on the GO! pedal, your stock 1973 axles should be OK.
Ethan Brady

http://www.bigscaryjeep.com

Jeepless, but I still have a lots of old parts in my garage!

User avatar
derf
Posts: 1168
Joined: Mon Jun 04, 2012 9:10 am
Location: Colorado Springs, CO
Contact:

Re: Ls swap? ??

Postby derf » Thu Sep 01, 2016 3:52 pm

The stock axles in a 73 should be a Dana 30 front and Dana 44 rear. They might hold up to a healthy small block V8. But I would look at upgrading.

Swapping in axles from a 74-79 Wagoneer would probably be the best route but the suspension changed so it's not a direct bolt in.

They put a 401 in the Wagoneers in the 70's so I would expect them to hold up to a 5.3 just fine, provided you don't drive like Blake.

User avatar
hutcho
Posts: 558
Joined: Wed Apr 25, 2012 11:48 pm
Location: Neosho, MO

Re: Ls swap? ??

Postby hutcho » Mon May 21, 2018 10:29 am

https://r.tapatalk.com/shareLink?url=ht ... are_type=t

Sent from my SM-N950U using Tapatalk


Return to “FSJ Fuel Injection Tech”

Who is online

Users browsing this forum: No registered users and 3 guests