My 470/409 took forever to get it to the top on every one and I even used an old distributor to seal the passges or Chevies won't get it to the top. I think it was like Cliff mentioned where the oil bands of the lifters were.
On my Pontiacs I usually do it with teh valley pan off to see if there are any leaks around the lifters. My old 72 HO block did for a flat tappet around where the holes were tapped for lifter restrictors. Had to go taller rollers on that block.
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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune [email protected]
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
1964 Corvette Coupe 327 4 speed
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