I am looking at retrofitting a cadillac 4.1 engine in my truck. my truck is a 84 exdended cab 4wd 4sp automatic overdrive with a 2.8 engine. the reasons i have thought about using the caddy are. 1,the caddy has the same belhousing as the 2.8.2, the caddy engine has aluminum block with steel sleeves. and is smaller than a sb chevy engine. I have an eye on a 1984 cadillac seville. which has a 4.1 engine with digital fuel injection or,tbi, i'm going to use the whole engine including the engine wire harness and computer. that way i will have v8 power with good mpg's that engine can be made into a 4.5 or 4.9. i'll have plenty of play room with engine mods latter on in order for the engine to work a person must have an engine from a rear wheel drive or conventional type aplication so that the starter will fit into the tranny. then all of the inside of the 4.5-4.9 will interchange like. heads, induction systems, and crank kits. i could see later down the road having tuned port fuel injection from a cadillac allante' on my truck engine. i was wondering if any one else has heard of doing such engine swaps. i'll keep forum posted on the progres.