13:1 Compression Pistons in 340 Small Block

Here’s food for thought......

The Craftsman NASCAR truck series limited the engines to a 9.0-1 static compression ratio and a small carb that still made over 700 HP.

The big secret besides the camshaft used was;
“Super excellent flowing heads!”
This, "excellent flowing heads" is very true I built a 292 cube W Ford for a project of mine with 200cc heads a large head for the little motor, you would think a 175 is what would work. A 248 @ .050 street cam and 600 dp, 445 tq 455 hp. There plenty of big blocks that can't post those numbers.