Thinking of changing direction with my engine. Opinions needed

My car has Edelbrock heads which are untouched other than a valve job by MRL performance (who also built the engine), and the Air Gap (and a 750 Double Pumper), and it made 470hp/455 lb-ft on the dyno. I have a roller cam and custom pistons (zero deck forged), and K1 rods which are much lighter. I love this engine. Runs amazing.
http://www.forabodiesonly.com/mopar/showthread.php?t=241854

The stock edelbrock head valvesprings really stink (and apparently the valve job isn't great). Mike from MRL said he could assemble some edelbrock clone heads which he thought were nice (I think they were Proform??), and you could get some beehive springs (I have them). Would probably make the most power that way.