[Bob Riebe]

Originally Posted by AU N EGL

Not quite Bob

History of the C5R and C6.r http://palmeter.com/

and Katech Engineering builds the C5R adn C6.r engines



http://katechengines.com/katech_inc/

http://katechengines.com/corporate_s...e_programs.php

Photo tour of P&M
http://ls1tech.com/forums/showthread...hlight=sebring

and
Slide Show:
http://www.katechengines.com/street...ebring_0001.wmv

Lots of Sebring Pictures ( Not 56K freindly)
http://www.ls1tech.com/forums/showthread.php?t=473089

Good Sir:
Just what am I supposed to be looking for, in the sites above?
I have dial-up and it takes a long time to connect fully.

I realize Katech built the engines, but as I said, or should have, the LS has been around long enough it is no longer unknown territory.
Depending on whether or not the ACO requires part no. on parts, there is now an after market cylinder block, better than the Chevy units.
The cylinder heads though are special, with ports and valve size made just for the ACO restrictor racing. I do not know if they are available over the counter.

Sadly, fifty miles from here I have an article that does a side by side on the ZO 6 and C6R, which partly details differences.

I do not know how current IMSA (ACO) rules differ from the original IMSA mod. GT rules, but if you ever saw a picture of a Greenwood coil-over car (the one without a leaf in back), starting point was 2/3 Corvette frame.
Now that may not seem like much of a prod. car, but where everything must be attached and located, plus a prod. firewall, is what makes a mod. prod. a mod. prod. car verses a tubey, where you can put anything damn near anywhere.

Bob