Billy,
Not too sure about the rear frame rail It doesn't look stock to me. I thought you could use 2X 4 or anything for a rear frame rail in SS, but had to have the stock rear frame rails in Stock. Needs the stock crossmember to mount that tank and transverse spring. Bob Pagano had a bunch of pictures of different Vettes that were built legal. He needs to see them before spending big $$ on something that NHRA Tech will frown on. BUT, Are they frowning on anything now?
I think Bob's E-mail is:
l88bob@aol.com,