The N crank with be fine, it good through 600+ HP, the block limit. Get light pistons with a good thin ring pack, which are most of the pistons out there except the cast and heavy, thick ring Speedpro pistons. Procomp heads will only be a bit more than adding big valves and all the machine work, upgraded springs and screw in studs. They will out flow any stockish iron heads out of box.
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