Just picked this up tonight. It is 2004 5.3 with 24000 miles. The guy that I bought it from said it came out of a Regency conversion RCSB. Anybody know if the Regency's came with any engine mods besides the headers (he had already sold the headers).

Man I am so stoked about getting this in. I'm going from a 4.3 in my 2001. Also does anyone know what little things I need to watch out for when swapping this over? Transmission fitment problems? Problems going from 2001 to 2004? Anything that i can line up before I start on this would be great.

Anyways here are some pictures:

http://shaggypokertables.com/motorswap/