Howard, that is a favorite picture for sure!!
Damn mod motors are too large!!
Cliff, I'm not being a stick in the mud - but have you dynoed your combination and have you spent time tuning the motor on a dyno. Seriously, you could be leaving 50 rear wheel hp on the table with ignition and fueling, maybe more.
That motor you have has the X grind cam and should be a fairly strong engine. Now it could very well be that it is tuned to the max and delivering around 300 hp to the wheels on a dynojet and you are not happy with it, but without some dyno numbers it is hard to say.
Hate to see you spend money chasing a new motor when it could very well be carb tuning, ignition timing, or even a cam/head swap could put you where you want to be.