302 casting small block heads
Depending what you find in the salvage Yards. '89 - 91 D150s have the stock 9.2:1 pistons and free floating Rods too.
If you want to swap those higher compression pistons into your stock bore build.
Can probably buy a complete engine for the same price of the heads, have to see what's out there. Those are roller engines, but parts will swap over to the LA engines .
The roller pushrods are different Lengths than LA pushrods.
302 headed '69 318