Quote:

Guys! Its spark knock. This sound fooled me when I was a younger man. Try ta back off your timing, see if it changes.



That sounds like something to check .

What is intial timing , total timing , all in by , and do you have your vac. adv. connected?

What pistons are you running with those open chamber ebrocks , what is your compression ratio ?

And someone asked , what rockers ?