Comp cams xe268h for 318

The pistons in the early ones have a larger compression distance but it ain't by much.
Here are some specs I found, in; HPBbooks how to rebuild your SMALL BLOCK MOPAR.
Piston compression distances: 1967 to [email protected], 70/[email protected], 72 to [email protected]
>>so these are about 1.97cc per change-up. The KB167 are advertised at 1.810 and 5cc eyebrows. This alone maths out to a difference of 8.77cc on the low-compression slugs.
Heads: 1967@57cc, 68 to 74@60cc, 75 to 86@63cc, 85/86 #302fastburns at 62.3cc, and the big-port police heads at 75.1
>>So these are about 3cc per change-up, not including the big valve heads
Boy it just cracks me up when I hear somebody say they have police heads,lol.

All SBM rods, up to and including 1973 had bushed rods.
The lighter weight 71 and older rods were forging #1318699.
The heavier 1972/73 rods,forging#2899496 came in 72/73 318s,and 68 to 73 340s; There must be a bazillion of these kicking around.