Hi have rebuilt a few Holley's in my day. but I never ran into this before
It has 3 inlets for fuel--no really the front bowl has an inlet on each side.
the rear is normal just one.
And it's vacuum secondaries but the rear metering block has what looks like idle adjustments.. Idle adjustments on all four corners?
On a vacuum secondaries I though the back barrels didn't do anything till they opened up..
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