Hello,
I have a 1965 Chevrolet Impala with the original 327 (300Hp) engine. I do not drive it that often. I have noticed a "tapping or rattle" noise when I am about 2500-3000RPM. It is more noticeable when the car is maintaining a constant speed as opposed to letting off the gas or speeding up (under load). I figured it was maybe a bad lifter, so I replaced them all. Of course, it is still there. Any ideas???
Thanks,
Paul