Yeah, too bad GM never made an all-aluminum 3800. I really like that engine and even have a Series II from a Camaro sitting in the garage. I bought it intending to replace the Series I I transplanted into my S-10, but never got enough round tuits. Perhaps if the 3.5 ever goes I'll look for an aftermarket aluminum 3800 block.

http://en.wikipedia.org/wiki/Buick_V6_engine