My car is an original 350 c.i. 2 barrel car. came with 265 hp and has a TH350 auto. It has the original heads #17's. I recently did an aluminum Edlebrock intake manifold swap and a Holley Carb 600cfm. I was told by a previos member "Banshee" unless I get 4 barrel heads and swap the cam, I might as well reinstall the 2bbl intake and carb. I am looking for some 4 barrel heads that have screw in studs that will work for my application. I looked at the casting numbers but I dont know which ones will work for me? 18's 16's 670's 48's or any others?? I just dont know thanks, Joe