FYI,
I have had tons of CJ's still have a couple, and a mopar small block will not bolt up to any AMC bellhousing, without alot of custom work.
Yes I have tried this.
Cheaper just to buy a quicktime bell and be done with it.
Something else sireland, is that chrysler transmission I am using behind my AMC IS however from a chrysler/jeep. It is very possible that they kept the AMC bell housing pattern for those motors only and the LA pattern is different.
I dont have the LA block infront of me to look to veriffy that but then it would make sense of what you are saying that they dont interchange, in which case I'd owe you an appology.
If this is the case, then I will look into what it will take to mount the A833 housing on the T5 case so that there arent starter issues.