
Intake @ 28"
.025...15
.050...31
.100...58
.150...83
.200...100
.300...142
.400...177
.500...201
.550...210
.600...217
.630 (coil bind on the test spring)...217
Exhaust @ 28", no pipe
.025...13
.050...23
.100...46
.200...81
.300...106
.400...130
.500...143
.600...155
Exhaust @ 28", no pipe, switched to undercut stem 1.50" valve
.025...14
.050...26
.100...49
.200...88
.300...118
.400...141
.500...153
.600...164
.600 w/pipe...178
.650...172
.650 w/pipe...191
The ports were smooth and quiet at all lift points, and port speeds wasn't too crazy either. No port matching, or pinch opening, etc. I mostly just worked on the short turns and cleaning all the casting crud out of the ports, and blending everything in. It was also interesting to see the difference the undercut stem made on the exhaust side.
It was also sickening to see what a quick and dirty amateur job on these 305 heads did compared to several sets of ford heads that I have spent a LOT more time hacking on