Getting ready to install rebuilt engine soon. I have a 69 Mach W/ 351W w/ AT, PS, Edelbrock alum heads, mild cam, etc. I have the original 69 exhaust manifolds but think headers are in order. Looking at the JBA shorties, but at $500 I want to check out all alternatives. Any advise would be greatly appreciated by someone who has been there, done that. Thanks!