273 Supercharged...ITS HAPPENING PEOPLE!!

are your stock rods and pistons floating? I think all 273s are, so replacement pistons would be, who said the speed pro are pressed only. and with a blower I would not worry about flow on the intake side, use the performer intake-very close in flow to a stock 340. run a cam with 10* more exhaust flow, and 1 5/8 - 1 3/4 headers