Ditch the 3.23 rear end gear for something in the 3.55 to 3.73 range, and forget about doing internal engine modifications. You're way over-geared and the engine is suffering from a lack of RPM.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!