My home inspection of Speedmaster heads

.100 74.7
.200 140.9
.300 193.5
.400 224.2
.500 242.0
.600 245.2
this is the intake side on our MP iron heads with .547 I [email protected] cam 13-1 compression 1.96 small stem chevy valve. Pretty basic flat tappet non roller rocker kB piston combo that’ll dip into the 10’s in Vegas (altitude) with a VERY wrong converter. Interesting topic always.... carry on!
jay