Edelbrock Rpm heads on 360

Nope. All will work just fine as long as the cam is mild. And you dont get carried away
I did this exact same thing. Took a bone stock 70’ 340 with 2.02 J heads and just some bolt ons i had added( headers, holley 700, aluminum dual plane intake) and swapped on stock eddie heads and added a hughes hydralic cam.... if i remember it was 230-238...... reused the pushrods and factory rocker gear.
Drove it that way for awhile before i started worrying about pushing holes in the factory rockers and replaced them with Cranes.