383 Rebuild - New Piston Suggestions

[1 Wild R/T]

Not to sure this is true without qualifying which heads.

Okay.. With stock heads... Be it 915's /906's /516's /452's /346's.... Yes a 72cc aftermarket head will get you there.. A 516 might get you close... But forget any 68 & newer head & the 67 915 would need to be milled quite a bit...

 

[BSB67]

Maybe I’m confused on where the conversation has gone. The IC687 is an off the shelf piston. 9.5:1 with 90cc heads, 11:1 with 75cc heads. Zero deck the piston, which will require about a 0.020” cut on the deck

 

[RemCharger]

I'll be working with my old 383 soon here, I milled 516s .060 with a steel shim, iirc about 60 70 in the hole. This was 25 yrs ago. But I will have to cc the heads and see what was really going on.
I'd calculated 10:1 but we'll see. Good thread

 

[1 Wild R/T]

The IC687 is kinda the new kid on the block & a good choice if running any of the open chamber heads, but it it a domed piston, which honestly on a 383 that's what you need.. But domed pistons can have negative impact on combustion flame travel...

 

[RemCharger]

The IC687 is kinda the new kid on the block & a good choice if running any of the open chamber heads, but it it a domed piston, which honestly on a 383 that's what you need.. But domed pistons can have negative impact on combustion flame travel...

For sure they do. And the 383 dome is higher than a 440. 41-42 degree on a race compression 383 and up to 45 on the eighth mile.