440 block CR ?

[jlatessa]

OK, some new questions;
I have a block from a 71 New Yorker, it has the big rods, steel crank and flat-top pistons that are .100 in the hole at TDC.

It had 906 open chamber heads.

On the boss, G440, 1 19 HPA
Block casting #s 10-22-70 and 2536430-70 and 27143 on the pan mating surface.
The other stencilled #s on the lower boss near the pan are illegible. I'm assuming this was a 370 horse Chrysler with these components.

What was the comp. ratio with the pistons so far in the hole?? Can't be 10.0:1 can it?

Thanks Joe Latessa   

[John_Kunkel]

Advertised CR for the HP was 9.7, count on it actually being a half point lower. The 906 heads aren't original to a '71, it would have had the 346 but the chamber size is about the same.

[BSB67]

if the pistons are 0.100" in the hole, it is 9:1 or a little less.