Speedmaster/Procomp Heads - New combo kit???
We have a set of these SpeedMaster/ProComp heads that we are going to port and use on a 426ci/360, so there will be some kind of information in the future.
OOTB unported head flows from our bench.
Lift...........2.02 intake/1.60 exhaust w/1-3/4" tube
.100............65/52
.200...........132/106
.300...........186/153
.400...........228/179
.500...........248/194
.600...........256/199
.700...........250/203