"The bolt pattern is 60^ GM for 4L30e and AR5."

So wait, will the 3800 bolt up to our 4L30e or not? Someone said earlier in this thread that it would not and would need an adapter. I know the 3800 and 3400 (which is a 60 deg V6) - both are typically used in FWD vehicles - share the same bellhousing bolt pattern.

Solenoids have been a known failure item in earlier 4T65e too but I believe you can get fairly robust ones to replace with, so I'd assume the same for 4L30e.

I didn't know you could retain the TOD with the AR5 - that's the 5 speed used in later Troopers (1999-2002) isn't it?

So assuming that the 3800 will bolt right in, why hasn't this swap been done already? Is there a big issue with motor mounts or something? Seems the F body parts like exhaust manifolds should make this easy?