340 heads on 360?

Elís Máni said
So i have a 1973 Duster that was originaly a 340 4-speed. unfortunately at some point in its life the engine froze and it cracked the 340 block. now it has a 360 out of a 1980's Ram with the 73 heads on it. i'm just wondering if and what 340 heads change on the 360. does it increase compression?, does it have bigger intake valves? or something, just general questions.
im kinda new too this so yeah.

Thank you,
-Elís M

If you took the 73 340 heads, cam and intake and put them on that 80's 360 block what you have done is build a 74-76 360 4 Barrel motor like was in the dusters and darts and the roadrunners and the 360 challengers and cuda.