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GM TBI from 4.3

1K views 11 replies 5 participants last post by  JeepnGreg 
#1 ·
I thought that I read on this board at one time that somebody installed a TBI from a GM 4.3 onto a 258. I have search til I am blue in the face and I can't find anything. Is this a feezable system for the 258? Who has done this, is there a write up???

Thanks in advance
Shawn

85 CJ7, 258 Nuttered, some rust with $100 paint job
Lots of stuff to do, no money to do it
 
#2 ·
In reply to:

that somebody installed a TBI from a GM 4.3 onto a 258.
Yes. Be prepared for frustation if you don't know electronics. It's a learning curve.
In reply to:

Is this a feezable system for the 258?
Yes. A 4.0L swap may be less expensive, in the long run.
In reply to:

Who has done this, is there a write up???
http://edge.edge.net/~deschamp/tbitech.html (On a Scout, but applicable)
http://edge.edge.net/~deschamp/tbitech.html
http://www.diy-efi.org/

Unfortunatly, Jason Wier's site seems to be off the web...

 
#3 ·
Hey, thanks LEVE.

I think I am still ging to attempt it, if I can get the equivalent of a Howell setup for a lot less money. But I am going to have to get some more info on the computer specifics.

85 CJ7, 258 Nuttered, some rust with $100 paint job
Lots of stuff to do, no money to do it
 
G
#4 ·
Yes shawn i have done this, and it's not that bad. The number one thing is to get a GM. wiring diagram, nothing else will work as good. check your local library.
Next get yourself a doner vehicle, where no one has been at it with a pair side cutters. and take everthing.
Next get yourself a GM, HEI distributor, something from the 70's with a in line six.
You will have to make yourself a TBI adapter for your manifold, I used a 1" aluminum block.
Also you will have to modifi. the distributer, it's not hard took me about 20 min.
I used a 86 Astro,BUT a pick up is easer MUCH.
My Jeep run's just as good as my daily driver
good luck e mail if you need help.
Mike

 
#6 ·
What Page?
So you have the adress?
you got your setup from a 4.3, right?
Thanks for your help, I am really excited to do it.

85 CJ7, 258 Nuttered, some rust with $100 paint job
Lots of stuff to do, no money to do it
 
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