250 hp out of a 250 cu.in. is asking alot. its gonna be spensive as the hilbillys say here ! just use 307 flat top pistons, show special attention to cylinder head I/E port & polish, lumps, 194/160 valves and a 292 exh manifold or headers, 390 cfm holley, aluminum intake. about the best you can do without going deep in debt.
jmo
bob
p/s find a early model cyl head with split exh. man. and intake.
Last edited by BCOWANWHEELS; 12/10/2011 12:45 AM.
