does anyone have the specs on these heads?
valve size and flow numbers?

Hope this helps I gave you a few to compair with

L31 Vortec

Valve I/E 1.94/1.50
chamber CC 64cc
intake port cc 170cc
flow at 28 H2O

LIFT INTAKE EXHAUST
0.100 70 48
0.200 139 101
0.300 190 129
0.400 227 140
0.500 239 147

Fast Burn

Valve I/E 2.00/1.55
Chamber cc 62cc
Intake Port cc 210cc

Flow at 28 H2O

lift intake exhaust
0.100 62 45
0.200 129 85
0.300 173 120
0.400 209 143
0.500 230 157
0.600 235 166


Eldelbrock Performer Center bolt

Valve I/E 2.02/1.60
chamber CC 60cc
intake port cc 165 cc

flow rate at 28 H2O

lift intake exaust

0.100 64 54
0.200 122 96
0.300 177 124
0.400 217 147
0.500 229 166
0.600 232 175

cool thats what i was looking for.
thank you.