Best carb for 351M

[john7979]

I am getting a new carb for my 79 F-150 and am looking at the holley truck avengers they come in 470 cfm and 670 cfm. Would the 670 be too much for the 351? The engine is all stock except for headers and the 4 barrel carb but I might add a cam in the future. I am thinking the 470 might not flow enough but the engine does not see over 5000rpm. Anybody know which one of these would be best for the 351M?

[hollenjoe]

the 670 should do fine, specially if you turn your 351m into a 400 later..

[Colo79Ford]

My 650 holley flows around 670-690 and it works great on my truck, even with our "thin" air up here.