Originally Posted by SSedan64
This link shows the Pump Mods>> http://www.chevytech.info/2c63.html
Many Builders recommend just changing the oil Filter after Cam breakin to retain the ZDDP additives in the oil for a longer period.
great link, thank you, pump is down ready for the mods, problem is to make to vertical groove on the gear bore, i haven't the right tool for that, but grooves on the bottom are easier to do, do you think i can make just them? any con?