Nothing internal other then taking care of it. PD Ignition gapped at .060". Performance Carsound Cat-back, Borla Exhaust. Went back to the stock airbox and Fram Filter. 4.0L TB and a 1" Poweraid Spacer. This has tuned the powerband a bit higher but still gives me decent power in the mid to high range. I could have opened up the exhaust more to allow for more top end but then I lose low-end. It's all about tuning for what you want and not just slapping parts on. Hard part it knowing where it's going to change things.
I probably should have kept my .440 cam but since I moved to a Emissions state, I didn't want to risk it.