Getting The Right Compression Ratio...

I think they took .10 off the deck. It sucks cause I was just there today checking out the weld job they did on the mounting ear, and I forgot to ask.

As for the gaskets, I havent picked out a brand yet. Most likely I'll go with fel-pro, since they are more commonplace. Once I get the gaskets picked out, I'll enter in their specs.


Here's where I'm confused. Those kb243 I ordered said:

NOTES (HYPER) Designated as O.E. replacement for engines manufactured in years 68-7l. All other years not legal for sale or use on pollution controlled vehicles. High compression flat top. Factory compression ratio 10:2:1. PISTON COMES OUT OF THE DECK .018".


So...doesn't that mean I need the 340 performer rpm heads instead of the stock 779's?

Sorry for the newbie questions, but that's what I am.