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How about part # 08686920 2cw204125168370 i have 4 of them in the crate,s cant figure application steve tinley park ill.

There really aren't any super easy swaps. Regardless of which engine you use you are going to run into the same problems. It can be done, I put a L36 into a 90 grand prix myself, but it isn't easy.

You really need to search as this is one of the most documented swaps I can think of. Google is your friend. That being said.. There's nothing really to be gained from an L26, especially since you're going to need to end up buying an TB adapter and buy an L36 TB anyway.. just stick with the L36. You will also need the mounting brackets from a W car, along with the ICM/coil bracket since I'm relatively sure the H body ones will not fit into a 1G. I know the 1G cars use a doofy rear engine mount that that the 2Gs don't use, pretty sure you don't need it and can just use the front one. You will need to move to the W-body oil pan and engine mount bracket, and I'm pretty sure also the oil filter adapter. For controlling the engine, you need a donor harness. You could get this from a 96 Regal or 98-99 3800 Lumina/Monte which will get you OBD2 and tuning capabilities. You will need to play GM Legos at the junkyard and find some way to control the kickdown cable for the transmission, there might be some bolt-on solution for it, but I don't know.

Just put a 3800 out of a Lacrosse instead. Those were S3. Basically an updated 3800. As difficulty, it's the easiest swap you've asked about but it's not a simple swap. You'd need to play raider at the GM section of the junkyard. Basically you need a lot of stuff from the earlier W's that did have the 3800... so the 95-96 Buick Regal, the 97-99 Lumina/Monte Carlo and 97-03 Grand Prix will be your friend.

Last I checked, for the 4T60-E's there were 6 versions. 1991-1993 CHEVY (3.1, 3.4 DOHC) 1991-1993 CADDY (4.5 and 4.9) 1991-1993 BUICK (3800) 1994-1997 CHEVY (3100, 3.4 DOCH til 1996, the 1997 DOHC was a 4T65-E) 1994-1996 CADDY (4.9 I think 1996 was the last year you could get a 4.9 in a caddy before being replaced with the 4.6 Northstar. If they had a 1997 4.9, I don't know what transmission it would have had) 1994-1996 or 1997 BUICK (3800). There is also a RARE 1993 Cutlass Supreme with a 3100. I am not sure which Version of the Transmission it got, but It was most likely the 1994-1997 CHEVY one. Differences are internal. the QDM's in the ECM/PCM that controls them are different between the 3 engine brands, so when trying to interchange. If you want PLUG N PLAY, you need specifics, otherwise, you have to crack open the sides, and swap out the valve bodies, and wiring. Not sure if people have found ways around them. My information is several years out of date from my foray into Lincoln Land.