don,t forget the trans and diff. upgrades with more hp/tq

[grumpyvette]

4l80e install in a c4 vette info
http://jobyteknik.homeip.net/corvette/2003-10-13_4L80E/

http://www.joby.se/corvette/mods/2004-12-26_4l80/

http://www.transmissioncenter.net/4L60E ... E_Swap.htm

swapping to a MUCH STRONGER 4L80E trans in a c4 vette

or TKO


viewtopic.php?f=33&t=586

another option is a floating solid rear differential
SKI DOWN IT sells these

http://www.azzatochips.com/

http://www.azzatochips.com/C4_Suspensions.html