Hello Guys, I have a solid stock 383 bottom end, running a stock cast iron 4 barrel intake,Mopar performance roadrunner 280 474 110 purple shaft factory non hp exhaust manifolds, stock single exhaust, I plan on purchasing a new set of CC 516 heads, 2.08 x 1.74 valves from Aerohead racing, Besides ordering the hardened seats. Should I spring for the larger 2.14 x 1.81 valves for only $50 more or would that be a waste? The motor is going in my 65 C body convert, automatic, 323 rear. Just looking for more torque out of a stock looking motor.