Seems like with 505 cid, it would want a better flowing intake and heads. But then you would also need a much bigger cam too (the OF also seems small for a 505 no matter what), otherwise I wonder if just the intake and porting would matter very much??
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70 TA, 467 cid IAII, Edelbrock D-port heads, 9.94:1, Butler HR 236/242 @ .050, 520/540 lift, 112 LSA, Q-jet, TKX (2.87 1st/.81 OD), 3.31 rear
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