I need advise on my headers. Currently with my combo, I only have stock 1 5/8 headers on my car. I think I just blew out a header gasket on my car, I just need a bigger header. I looked a custom headers and found them for my 347 up too 2 1/8 for 750.00 dollars. Can I fit a 351 header on my 347 block to fit my 67 stang? Does anyone have good advise...