Byronrace, ya the dip he said was when the vacuum secondaries kicked in. This is two 1968 Holley 735's on a 1968 tunnel port and he said he could lean it out a bit and get 10-15 more HP but i said if a bit rich is safer then stick with that. It's still NOS 1968 std bore block and i don't want anything bad happening !!! And i later found out that the matched carbs were built for the 427FE as well which is nice to learn... think they were listed for a dragster. I'll probably take it to a local dyno shop to get a 7200rpm run and i'll post that up. Oh byron, I have the iridium plugs by the way and it does have large gap of .44 or .45 if my memory is correct. Oh and i switched to the cast aluminum valve covers which fixed the
oil splashing into breathers. Had the chrome pent roof i believe they are called.