seems 440 builders are getting expensive around here, grab them if the price is right.
My notes from the old Silv-o-lite catalog show the 72 and up 8:1 pistons have a compression height of 1.912"
The 66-71, 9:1 pistons have a compression height of 1.970"
The 66-71 HP, CH = 1.990"? (this still seems fairly low compression?)
The TRW six-pack piston, CH = 2.061"
68-69 440 350HP, 375Hp and the 69 390hp 6pk engines used the same piston.
I imagine that 66-67 is the same because they both have the same advertised compression ratio like 68-69 .
67 hp = 2.00"
68-70 hp = 2.03"
This is more accurate of FACTORY pistons , the numbers at the top are not factory numbers ... not including 70-71 6 pack engines
