Jarek ,
it is not so bad with parts
use ebay..........
Kurt will help you....
http://www.whiteracingproducts.com/,
also Jerry will ship items to you.....
http://jerrysgaskets.com/store/index...=index&cPath=0
and here is one nice guy from Germany
http://freenet-homepage.de/corvette-parts/ and best solution for chip is
http://www.zr1specialist.com/
hope I help you.
regards,Jano
