I have a early 22R that I'm putting in a 88 4wd w/22RE. What kind of problems will I encounter? I know electric to manual fuel pump to be an issue, but what type of wiring issues will I have? Not worried about gauges as I plan to install aftermarket oil, temp, and voltage gauges. I would like to use the ingnition system that is in the truck if possible.

You didn't make it very clear if you're completely going EFI to carb, or just using the long block. Am presuming long block swap with my response here.

Presuming 'early' means the round exhaust ports, you will need an early exhaust manifold in order to fit properly. Take a look at the 88's manifold and see if the O2 sensor is mounted there or not; that might be an issue.

On the head, you'd move the blockout plate from the 88's head onto the early head. The camwheel for the fuel pump won't be a problem, but if you don't want it, I'll take it. You'd then move the shim on the front of the 88's cam to your early cam, so it bolts back up okay.

Ignition system, the carbie ignition system is NOT THE SAME as for EFI, so all that's got to move, right down to the distributor, IIRC. Again, if it's the real early rig, the old alternators had an external regulator, so you can't use that for your EFI; seems to me the plug style is different as well.

If the early donor is out of a 2wd, you'll have to swap over the oil sump, pan, and dipstick, as they're different.

That's about all I can think of off the top of my head.

And NO, you can't swap head/blocks between earlier and later 22Rxx's, as the deck heights are different.

I'm completely going EFI to carb. I knew about the differences in the block/heads which made it impossible. The 22r I have is in great shape and the 22re is running but in need of a rebuild.

So I'm really interested in what changes I have to make to go from electric fuel pump to manual and what I need to run the ingnition (power to starter from key, power to coil, and alternator and if I can bypass the computer).

1st,just swap intakes and your efi system will bolt on / work with your 22r.

If you don't want to keep efi, all you need to do is get a fuel pressure regulator for the electric fuel pump (carb wants 4-7psi). The only electric wire you need is a hot wire to the choke, and hot/ground to the fuel cut solenoid. See my carb faq link in my sig for more info on the wiring.

I'd swap the EFI over to the new motor personally, although you didn't hear it from my mouth <img src="/forums/images/graemlins/ignore.gif" alt="" />

-Scerb

I was under the impression that the 22RE EFI intake would not work on my early 22R head. Got my info here. Google/search this.

Just Imports, Dan Minick, Automotive Rebuilder, November 1998

This is where I got my info.

EFI and carb intake manifolds aren't the same critter.

So, back to my original questions.

So, back to my original post.

I'm really interested in what changes I have to make to run the ingnition (power to starter from key, power to coil, and alternator and if I can bypass the computer)or if I even need to make changes to the ignition/electrical when swapping from EFI to Carb. Your FAQ doesn't cover these items.