Fresh 302 mexican with a fresh c-4 behind it, primed and ready, Take it out for a few runs and makes a noise similiar to a baseball card hitting a bycycle's spoke, it does it always when driving and rarely when in park. If you rev it up, it will do it for a few seconds and die away, I only had it occur constantly for a few times in park but dies away if I kill and restart. I suspected valve train, but the rockers are all snug. Any Ideas? Thanks
Mike
Mike