Gentlemen or Ladies, I've rebuilt the 454 in a 74 Vett Roadster....Nothing special....Factory specs. I installed the modified distributor to prime the engine.....Attached the 1/2 in. drill (Max RPM of 860 RPM simulating engine speed of 1720 RPM) and start cranking.....60psi...new pump...electric guage. 30 seconds later oil begins to appear at the holes in the rocker arms on cyls 1, 3, 5, and 7 with sufficient flow to lube the valves. After 60 seconds or so oil appears at the rocker arms at cyls 8 and 6......Two to three minutes later the oil finally appears at the rocker arms for cyl's 4 and 2 and NEVER gets to sufficient volume to flow down the rocker arms to lube the valves. Clearances are within spec at all bearing surfaces.......Seems to be a major lack of flow restriction (or something) yielding less than sufficient flow/pressure to cyl's 1,3,5,7............Ready to set fire to this old stove!

Any ideas?

Tx

Tom