Hello again,I have a 72 chevelle ss 454 BB I tried to put my Headman headers (part # 66002)on and found they hit the airconditioning box. I have Merlin heads, they have D shaped exhaust ports, so I need the primary tubes to be at least 2". Does anybody know what will fit? They do not need to be Headman although they look great!
ThanksBill

