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2x4 Holleys
I am running two 600 cfm Holley carbs. that I got from Carl's Ford Parts. I am running them on a low riser manifold, but for you, since you have the MR heads I would recommend using a MR 2x4 intake. The 2x4 Tunnel Wedge would be my recommendation if it will allow the carbs to fin under your hood and scoop. Mine barely clear.
I had absolutely no problems at all with the new carbs from Carl's Ford Parts. He sells new sets of BK and BJ carbs that have been run-in. The only adjustments we had to make were the idle speed and the idle jets a little. Of course we had to installe the 2x4 linkage, also available from Carl.
Performance is awesome. You can adjust the linkage to bring the second carb in as soon as you need it. If you sort of double pump the throttle and really hammer it the secone time it will almost rip your head off.
Honestly though, a single larger 4 barrel with a good intake like a sidewinder, will probably give better acceleration, somewhat better. But, the slight difference is more than offset by the WOW facter of the dual quads. The only thing better is a set of webers poking up at you.
Good luck whichever way you choose. Bob
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