B block, BCR caps and girdle, 3.90 stroke, 6.70 rods for about 470". Dry sump if you can afford it. Victor heads, ported standard window are good baseline. I'd go Ferrea hollow intakes, beehive springs and Schubeck lifters on about 260@.050, .600'ish lift cam with 1.6 rockers, Hughes, T&D or HS. S/F....Ken M