[Ol' Ron]

Installing larger valves in an engine has been a long tine racing practice and I agree using an expensive racing valve MAY add something to the performance of your engine. However there is aalso another reason for using a larger valve, a bad seat. From late 40 through 53 Ford did not usr a hardened seat under the intake and sometimes this area was in poor condition. Which could be solved by installing a hardened seat or using a larger valve. The 1.6 valve from PAW was an inexpensive soultion. For my sterrt engines I would undercut the valve at a 20 degree angle to improve breathing. AS been said here I don't think installing a 1.6 valve in an engine with a hardened seat because the seat may come loose causing major damage to the reat of the engine. I recommend the use of the 1.5 Chevy valve in both the intake and exhaust in any engine with a small base circle cam in a street engine, should last forever.