Can you use stock rocker arms on Edelbrock heads

The old MP rockers were actually thicker thruout. You can see it in a side by side comparison. The newer MP and Mancini ones have some extra strength around the pushrod from the set I saw last year... It's not a thicker metal, but has some tiny ribs around the backside of the PR seat. I consider them stock arms myself, because they will still flex like mad and dont have the best ratio accuracy. AS far as pushrods, you can use any THAT ARE THE RIGHT LENGTH. When an engine is rebuilt properly, the distances between the rocker and the lifter are affected. So a stock part may be too long. The last part I order is always the pushrods and i use a checking one to measure for the right part. I have yet to need a custom length, but off-the-shelf shorter numbers are commonly used. You really should check. i'm not going to say stock will work because you should be changing (correcting to blueprint dimensions) too much. Decking, milling, smaller base circle cams, valve job quality all affect the pushrod length... But you may find a stock length does work.

i used both stock rockers and pushrods with eddy heads...

I built a 1968 383 with eddy heads used new rockers and push rods from PAW and the metal was thicker than the stock ones. the engine in the car did keep pushing the push rods threw the rockers . the new engine is in and rus great!!!