[John Brown]

I've got an old Holley rebuilders catalog that shows primary metering block as #4901 and secondary metering block as #4519. You didn't ask, but that carb originally came with #70 primary jets, #76 secondary jets, a #21 squirter, and 8.5 power valves in both ends. J.B.

[Edited by John Brown (03-26-2002 at 07:13 AM).]