Quote Originally Posted by stylingZ
I have a 1970 LS6 454 which makes it a gen. IV engine, but I did not know if it requires a "SPECIAL" flexplate (starter ring) for my turbo 400. I am aware that the engine is externally balanced.
no but you may want a thick fly wheel HD. some are sfi but you can buy them without the sticker for less$$ if your are making HP you want one. not one of them cheap ones