After reading your site Bill, are the adaptors mentioned, can they be used for the 258 on the Jeep?
Nope, IIRC the jeep has a rochester pattern. The adapters for 2 barrels are for the holley/ford pattrern. I just went back up and was looking to see if someone else started making them.
You might want to give AFI a call. Norm does a lot of different engines and may already have an adapter he would sell. The link is listed in my FAQ's.
Will I have to mod the HEI to work with the GM setup?
Yes. It was posted on here earlier and is also in my FAQ's for distr's.
You can use the magnetic pick up in your distr but it needs to change from the 4 pin to the 7 or 8 pin module for EFI. 7 goes inside, 8 mounts outside the distr.
Chili, you say you bypassed a sensor. Is this going to be in your guys writeup?
When you bypass something, do you have to change the ECU or what?
The wiring bypass for the ESC and knock sensor is something I started about 1 1/2 ago. it was an experiment to keep from having to burn a new chip just to eliminate the knock circuit. It worked and now no more SES light when you get rid of the ESC module.
The bypass is in my wiring thread. It's probably the only place you will see it, (except for here now)
Will I have to get a new chip burned for the Junkyard TBI on the heep?
As jadams can attest to...when you put a system on a motor it was not designed for, there can be minor tuning that is required. You are using a system from a short runner V6 and mounting it on a long runner inline 6. the fuel and spark should be adjusted.
The motor will run fine and it may run real good compared to what you had..but it still should be tuned...after you start logging data.
Bill, on your page, you mention getting the right computer and replacing chips,
is this for the IH's only?
Nope, you can use a 1227747 that was originally in a V8 for your 6 cyl. But you have to change the main chip and the limphome chip with the 6 cyl chips. Sometimes you can't always find the computer you want in the JY.
You can have an ECM go bad but the chips still be good, so you can just swap the chips.
I always recommend getting the engine running and all bugs worked out while still running the stock chip. Providing you picked a system that closely matches yours!!