Hola The 66 440 intake manifold, and the heads are the same as the 64 - 65 413's. For 67 - 70 all 440's used the same spread bore and higher rise intake manifold's. But, some of the 67's with single exhaust still used the 64 - 66 heads. Rodger & Gabby 47 Flat head six w/oil bath air cleaner 66 440 w/Edelbrock SP2 R440 & AVS carter and early/first style dual snorkle air cleaner housing 67 440 w/906's, Offenhauser 360 & AVS carter and early/first style dual snorkle air cleaner housing.