Bore, port, 4 mil. Pull the motor box it up
Ship it to redline,FAST,wildcard,any sponso tell them you want to go fast. Wait a few weeks, pay money, install motor and hang on
Long rod. I had a short rod and I'm paying for it now. My cylinders were egg shaped after a season. I will say it was a long abusive season, but still only one. The long rods put less stress on the cylinders.
I love my hipers. I got mine for a steal locally. As far as psi, shit. Maybe 2 or 3 in the rear and 5 up front.
I can run zero and not worry about the tire falling off. If I want to swap from my paddles to a dirt tire it takes only a few minutes per tire.