Motor Racing Replica News (Issue 4) did a nice article on the 2C and 2D. They used the 327 block from Monogram's Rampage Camaro but this was written in 1991(!). There has to be a better choice now. For the 427 I would suggest any of Revell's 70's Corvette kits (Owens Corning, Stars & Strips etc). Not sure about the 327, I would have to do some research.