Dear Vince;

It doesn't.

This may have been a (piston MFG) way to avoid EPA rules and probably how it got "de-tuned" in the first place.

This happened to one of the 351" Ford V-8s too. It dropped it from 225 Hp. to 165 in the 70s.

Remember the 60s, a stock 327 2bbl was 220Hp.

This (Gov. interference)helped make 'imports' look attractive when the Arab embargo occured too.

John M., I.I. #3370

"There are no shortcuts to any place worth going". -Anon