Originally Posted By JohnRR
Originally Posted By 451Mopar
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 .

Originally Posted By BSB67
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


I thought that was true for the 350 hp motors, but was not sure. And for some reason I was thinking that the 71 piston was 1.99, but I don't know where I got that.

To the OPs question - I don't know. I doubt that it is a 2.00 or 1.99 piston, but not sure if there was something in between that and the 1.91 piston.