If the vacuum of your engine (the driving force behind the calibration of any carburetor) is anywhere close to the stock figure; the ORIGINAL Q-Jet is by far the best bet for this engine. I cannot think of anything that would come close on a street-driven vehicle.

If this engine is race only, then you might consider an aftermarket carburetor. If so, remember that your manifold is set up for a "spread-bore" design. This means that to use the original manifold, you MUST use a spread-bore to replace the original carburetor. The adapters simply do not work, period.

Jon.