The one case that I remember was a mechanic in Arizona who was a friend of acquaintance of Bruce Anderson. Bruce has now moved to Idaho and now drives a Suzuki Grand Vitara after his 2nd Gen Trooper lost a battle with a mule deer.

IF Bruce's website is still around it has some information on the conversion, but not a lot of detail.

Also, I believe that it was a pre-Northstar engine that was used.

UPDATE

I just checked Bruce's profile here and found the reference to his website. There is a link to some photos and a very little detail. There is a notation, though, that the person who did the conversion does custom conversions and it looks like there is a link to his site, but I didn't follow that link.

Bruce's Website

tiny, As far as I know, any engine with the GM 60 degree pattern will physically bolt up to your GM 4L30e.

This includes the gm 60 degree family of engines: 2.8, 3.1, 3100, 3400 Plus some other GM engines with the same pattern, 3800, Cadillac 4.9; northstar, aurora and others.

the v8s often require one bolt hole to be relocated on the bellhousing I have read.

My friend is the first person I know of to put a Caddi engine in a trooper. He has had 2 4.9's which both died of holes in the block. He is also good friends with the owner of the top Cadillac repair shop in Phoenix and he always has a Cadillac in his shop with a hole in the block.

I just did head gaskets on a Isuzu 3.2 at 177,000 miles a Cadillac engine if it made it that long which it would not. Would have a hole in the block not a blown head gasket

P.S. I am not trying to just be down on a caddi engine because I'm jealous they are a far cry in terms of longevity from a Isuzu 3.2 or a Gm 60degree V6
you will no way get 275,000 miles from a Cadillac engine

Also a 4l30E isnt up to v8 torque a Mua5 is much stronger and if not abused will handle the V8.

yep looks like I thought he said auto. Same goes with manuals. You just trade flexplate and torque converter issues for clutch linkage and flywheel issues. <img src="/forums/images/graemlins/smile.gif" alt="" />

i was looking on ebay a few days ago and saw an ls1 4l60e combo with wiring harness' and ecu for $2k. Seemed like a reasonable deal to me. <img src="/forums/images/graemlins/wink.gif" alt="" />

Caddy's will make it to higher miles. Its a dangerous blanket statement to look at vehicles that are in for repair and then conclude that they are all subject to the same failure. Related to isuzu using the same logic, you could look at a few oil burning, ceased up 3.5's and conclude that Isuzu engines die early. Don't use them.
not the case.
<img src="/forums/images/graemlins/cheers.gif" alt="" />

Do a search on ebay for cadillacs and sort by highest mileage first.