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uh oh. I don't know how mine flowed before porting

but this what they flow after Jeff ported them

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i was shocked by these numbers on the intake just as much as anyone looking at this,, this thing was wayyy good for a 2.250 valve.

superflow 600, 4.320 with bore notch, 28"

intake 2.250
.100-78.5 cfm
.200-162.4
.300-257.5
.400-342.4
.500-396.5
.600-422.4
.700-440.7
.800-450.6
.900-456.5

exhaust 1.940
open at flange/2.0" tube
.100-69.0/70.5
.200-146.2/152.4
.300-178.2/185.0
.400-208.4/220.8
.500-239.5/255.6
.600-259.1/274.0
.700-268.7/286.7
.800-273.7/293.6
.900-278.7/297.3


this is a std low exh port and a std int opening, its a good sized port but with only two pushrod tubes in the head, #1 and #5 exhaust. ferrea valves.

jeff

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Those numbers look real close to the Stage V heads (Stage V ported) I had flowed on a Super Flow 600 bench several years ago, maybe a little better