I just dropped off my 1957 283 V-8 motor to have it rebuilt today and am going from the 1957 Turbo Fire 283 V-8 which was the 2 barrel version with a compression ratio of 8.5 to the 4 barrel version Super turbo Fire with a 9.5 compression rating . I gave the rebuilder a set of correct 539 4 barrel 1957 heads and a correct 4 barrel intake manifold . My question is dose anyone have the both the 2 barrel and the 4 barrel cam profiles so I can inform the engine builder of the 4 barrels cam profile . thank you very much , Dom