GM HEI Distributor Vacuum Advance Block-Off Plate - Clockwise Rotation SALE-ELIGIBLE OEM alternators will work but

OEM alternators will work but some aftermarket alterantors are too deep and will contact cylinder head

Its lightweight construction and reduced overall size make it a popular choice for street rods

It's been designed for performance and reliability

simple wiring

this component helps maintain reliable distributor operation and dependable ignition system performance

GM HEI Distributor Vacuum Advance Block-Off Plate - Clockwise Rotation SALE-ELIGIBLE OEM alternators will work butLock out the vacuum advance on your GM HEI distributor with this direct bolt on block off plate from Top Street Performance. Designed for standard clockwise rotation TSP and GM HEI distributors, this plate installs in place of the vacuum advance canister, eliminating unwanted timing variation for racing and performance applications where fixed timing is required. No welding, drilling, or modification needed it bolts directly into place for a clean,