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Dee · 07-27-2011, 05:10 PM

Yes, I'm using the smaller 4100 Autolites ( one '57 Ford and one early '60's small block Ford) I believe they are rated at 480 cfm. The larger 4100's are rated at 600cfm and are a little too much for the flathead Zephyr. You do need to be very careful about sealing the base from any potential vacuum leak on these carbs. I've converted both to manual chokes and utilize the stock controls on the dash. I have found that these carbs require more "choking" on cold startups than the old Holley 94 style carbs. I have also used the small 4150 Holley ( '57 Ford) and it too runs very nice.

07-27-2011, 05:10 PM	#17
Dee Member Join Date: May 2010 Location: Port Orchard, WA Posts: 67	Re: OPEN PLENUM 4 BARREL INTAKE GOOD?Bruce? Yes, I'm using the smaller 4100 Autolites ( one '57 Ford and one early '60's small block Ford) I believe they are rated at 480 cfm. The larger 4100's are rated at 600cfm and are a little too much for the flathead Zephyr. You do need to be very careful about sealing the base from any potential vacuum leak on these carbs. I've converted both to manual chokes and utilize the stock controls on the dash. I have found that these carbs require more "choking" on cold startups than the old Holley 94 style carbs. I have also used the small 4150 Holley ( '57 Ford) and it too runs very nice.