in the future i plan on building a 418 or 427 stroker for my street car.will be carbed with possibility of a vortech s-trim blow through@10psi or 150 shot nitous.was going to get a all forged stroker kit.engine will never see above 6200rpm.i am going to run a hyd roller cam.i can get ahold of a 69 351w block or a 94 roller block for the same price,was worried that the main seal design would leak more on the 69,also worried about the lower deck height with stroker kit and p/v interferance.also,will a regular 9.500 deck height intake work with the 69 9.480 deck height?would the roller block handle 650-700hp?both the blocks are stock bore and in very good shape.