Thread: Edelbrock vs Holley

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Either one right out of the box should work fine. IMHO, though, the Holley is a better choice as I believe they are easier to tune, but to use the Holley it will require a spacer/adapter since the Performer is a spread bore manifold and if the Holley is bolted directly to the manifold the fuel signal will be messed up.

Originally Posted by NTFDAY

Either one right out of the box should work fine. IMHO, though, the Holley is a better choice as I believe they are easier to tune, but to use the Holley it will require a spacer/adapter since the Performer is a spread bore manifold and if the Holley is bolted directly to the manifold the fuel signal will be messed up.

The performer manifold comes in square bore and spread bore, mine is a square bore....!

Edelbrock square bore, with Holley 670, the only thing he`ll need do for clearance under rear bowl he will have to modify a vacuum fitting to sit lower under carb.