I have the 2.05 pro tru pistons and only ended up at 9.7 to 1 with a 80cc head.
The speed pro 2295 hasn’t been mentioned. If it were my engine I’d leave the short block and run the 75cc budget Edelbrock Head.

I don’t believe they’re available any longer.

Besides, there are plenty of better options nowadays.

I would have to completely disagree with this. You are not going to get a 10% increase in power with a one point increase in compression. More like 3 to 4 percent maybe, with the gains being greatest on really low compression engines. The difference between 9.6 and 10.0 on a stock 440? Wild azz guess,5 hp. Maybe. Or less. You will never know the difference.

You could see just about a 3% increase in power going from 9:1 up to 10:1.

So, on a 350hp motor....... about 10hp.

Yes, thank you! I am looking at those now.

I appreciate everyone trying to help and was answering clarifying questions by others.

Whichever I choose, I will get the block decked to make up any difference.

a simple solution if all the OP wants is a 10:1 factory type 440. just mill .030" off the heads and use a .020" steel shim gasket and your there. keeping in mind the only difference between a factory 10:1 engine and what's there is the location of the top of the piston. the top of the piston is the floor of the combustion chamber but it's expensive to move the "floor". just simply move the "roof" of the chamber down and the relationship between the two will be near identical to a factory 10:1 engine. if the 10:1 thing is what I wanted; then this is the easy way there. of course we need to keep in mind that the10:1 engines were never a true 10:1 compression and these engines are not pump gas friendly.

as far as timing goes the service manual gives specs. 5 degrees BTDC for initial with an automatic trans an zero for manual and 35 degrees total (staged with a light spring and heavy spring). duplicating a factory curve will depend on having the correct springs and plate.