so these Ga heads came on the 455 i got in my parts car.. PO claimed they were ported.confirmed he isnt a liar..the motor made really good power before i pulled it out..my plan is to change to edelbrock heads..will the e-broks make more power?

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Hard to tell but don't look ported to me. Quick answer would be yes you will gain some hp/tq with the Edelbrocks as compared to those heads.

 

they are ported...

 

I would ask what's your plans for the car? What do you want the engine to do? There's lots of ways to get power out of your engine, but how much power? How much do you want to spend? Will it be street/strip, or drag strip only? How about rear end gears, and transmission selection? I'd brainstorm on these things first, then decide what to go with on your engine build. I may be getting way into the weeds beyond what your asking, but I'd consider the whole package in your build plans.

As far as what was done to these heads you could have them run on a flowbench to see how well they flow. I don't know much about flow work, but do know there's other considerations beyond just grinding things out as large as possible. Some of the guys here who do race their cars may be able to share more details on head work. John