heres the deal i have a b18c5 block , and i have 2 heads gsr , and a b16 ..both have aftermarket manifolds, i have been hearing good stuff about both, but yet i am still undecided. its going into an eg ,gsr tranny also...i need advice and opinions please...what would u do?why? i want the best performance .more than likely all motor... Thanx for the help TR