I am getting ready to replace my 134k engine from my T2. My questions are

1. apex seal that can handle a full 15 psi? 2 or 3 part seals?
What brand of seals?

2. Porting intake and/or exhaust?

All coolant and oil mods will be done on next engine. I am mostly worried about the portings.

 

one brand of seals: Mazda
any seals can take 15psi, but if u go 3mm steal over the 2mm steal u have a few extra lives. that is the 3mm seals take a few more hits of detonation. both the 2 and 3mm seals cost the same it's just that u have to machine the rotors to fit the 3mm

u can have your ports extend ported. but u must have it done by someone who knows what they're doing.

u could have your stationary gears nitrided (like the standard 3rd gen eng) for higher rpm capability.

and at 15psi, u could have extra dowles fitted. dowles being some more of those long bolts which go through the entire housings to limit twisting forces from high boost.

 

Thank you for the help from down under. It has help focus my build list.