Fox .35 Stunt Mods

I've raced these engines in box stock form but, I don't know too much about mods I can do for stunt.
Here are some things I plan to do, let me know what you think:

De-burr everything
bead blast outer crankcase
Chrome cylinder sleeve
lighten the piston
Chrome crank shaft and wrist pin
Use stuffer back plate from factory
Use Super Tiger needle valve assembly
Replace bolts with SHCS
True the mounting lugs in the mill
Custom made double bushed conrod
Fill some of the bypass port with steel epoxy

I'm not sure which head to use on it for stunt, the stock one with extra gaskets or the factory hemi.

Any tips?