I thought you might be interested in some of the latest developments of the Chev LS1.
These motors are becoming very popular for Cobra powerplants down here due to our strict emissions laws.
The 350 version has been around since 97 and people have been taking them out to 427 for a while. I just found this 450 cube version that nearly hits the legendary 454 number.
LS1 454
Cheers