Is the Adapter Plate OK?

[Richard Dobson]

I bought a 396 engine with a Edelbrock #1411 750 carb with a square bore adapter which is on the stock Chevy 3883948 intake manifold. The stock manifold is for a Quadrajet carb. Edelbrock spec's out a Quadrajet adapter plate #2696 for the 1411 on this manifold. I just want to get the engine running to see if it is OK, then later in the future I plan on putting on the proper Edelbrock intake for this carb. Will I be OK to use the square bore adapter for awhile? Will this cause poor performance? The PO said he had 10K on the engine after a rebuild. Thanks for any help.

[Sinister]

Should be O.K. you'll lose a little low end torque, but you probaly won't even notice...

[49m]

I put an adaptor plate on mine an it works fine.

[Richard Dobson]

49m, thanks for your reply. I am concerned because the PO used a square bore adapter for his Edlebrock carb instead of a quadrajet adapter like Edelbrock recommends for a stock Chevy quadrajet manifold. I guess he thought using a square bore adapter was like having a square bore manifold.

[EAST SIDE LOW LIFE]

I installed an adapter plate, supposed to incease high end performance, never noticed any difference in performance low or high. Reason I put it on was to be able to get another vac. port.

esll.