273 Build

66fs said
The funny thing about the early 273 heads is they jump + 9 cfm (178 cfm) at .400 lift compared to 675 (169 cfm) using your numbers and others. Then they drop back down to about equal (174 cfm) with 675 (171 cfm) heads at .500 lift.

Almost like they planned it that way.

Basic 273 cam specs:

1965 180 hp 2 barrel .395 /.405 lift 240°/ 240° duration
1965 235 hp 4 barrel .415 /.425 lift 248°/ 248° duration
1966 235 hp 4 barrel .420 /.430 lift 248°/ 248° duration