AMC 360

Working on a customer's 1991 Jeep Grand Wagoneer with an AMC 360, not a Chrysler 360. I'm needing to replace the exhaust manifolds. Customer found some manifolds at Summit, but they don't designate AMC or Chrysler. I don't know if they are interchangeable or not. He had purchased an intake for the Jeep and it must have been for a Chrysler 360, 'cause it will not fit. Dorman lists manifolds, but again doesn't differentiate AMC or Chrysler. Maybe they are interchangeable, does anyone know for sure that can help me. Thanks in advance

I think the AMC heads are different and the Mopar manifolds won't fit.

Nothing is the same between those 2 engines. Dorman does show correct manifolds for that AMC application.Dorman

Summit also shows the correct ones from several vendors.Summit

I have a couple of AMC Ambassador wagons with 360's, nothing is the same as Chrysler 360's...

Thanks for the help, guys! I had found the same Dorman numbers but just wasn't sure if they'd fit an AMC 360. That's what I'll order. Thanks again!

Good luck. let us know if they're OK.
Some have reported the fit isn't great. You may have to do some fitting.
My understanding is the small outer bolts were a change starting in 1979.
There was another change in design - which I don't recall but I think its mid 70s.

OMIX had them new with the heat stove.
However my experience with OMIX is they don't spend a lot of effort on QC.
I decided to rebuild mine.

The exhaust manifold bolts used since late 1969 early 70 are unique. Its was an early change for this generation AMC V-8 and there was service bulletin to dealerships.

Intake manifold on the AMC 360 needs the heat shield. Might have to take the one off the old intake.
Valve train is another obvious difference.
Some stuff that is not AMC:
The ignitionsystem is Motorcraft. Alternator is Delco - should be 12SI. Starter for '91 may be Chrysler. If not its Ford.
The starter may still have a remote 'ford type' solenoid, but by '91 there also is a Chrysler type starter relay.
Transmission is Torqueflite 727.

Are those bolts drilled hollow? Looks like an extreme race car weight saving trick. But AMC may have done that to make it easier to remove broken bolts. (Keeping the hole for easy-out removal centered?)

Yes the bolts are hollow, been that way since the 70's at least.

Just the tips of the bolts are hollow.
I've not seen the service bulletin myself. It apparently explains this was to reduce incidents of the bolts backing out. Having a hollow area creates more tension while staying in the elastic range for grade 5 bolts.