LS1Howto.com

[anonymous-user]

Never seen this before but really interesting. A lot of it will apply to Gen IV engines too I guess: www.ls1howto.com/index.php?category=0

[MyM8V8]

Been on to that for quite some time. Brilliant write ups.

[gsd2000]

www.ls1.com
www.ls1gto.com
www.ls1tech.com

the above are also good

[ringram]

hardcorels1.com and speedtalk.com are also good.
Harcorels1 is less intimidating, but good info.
ls1tech has the most info, but you have to know whose posts to read as there are a few that just post willy nilly.