Help! My '71 Pantera has a 750 CFM Holley (too much capacity for a stock engine in Denver) with inoperative secondaries. The carb (3310-3) is a square bore design, but upon removal I found the manifold is a spread bore - with a carb spacer that has holes about 20 percent smaller than the secondaries! Found a 650 CFM spreadbore Holley (80551-1) that is supposed to replace the stock carb, but the carb venturis don't line up (not even close) with the manifold bores. My intake casting number is D1ZE9425BB; other numbers readily apparent on the intake are IE4 and 13728648. An hour spent with my friend Google didn't help identify the manifold, allthough I did find Dan Jones's intake manifold information on a Mustang site, but my casting number is slightly different. What intake manifold do I have?
I want to end up with a Holley 650, vacuum secondaries and my stock intake manifold...any ideas or advice? I'll call Ford in the morning - but sometimes you folks have already threaded the needle!
Thanks,
Terry Marsh #2207
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