Not Ranked
You need to talk to mr0077. He has a pair of 390 cfm vac. sec. Holleys on his 427 MR and I can tell you it FLIES! Drivability is very good and he really doesn't have all of the bugs worked out yet. I have a set of 390s on my 351 Cleveland and they work well also. They seem to be very flexible and drivable carbs.
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David Shelton
Lone Star Gashole!
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