Hi there, I'm currently building a TB42 with forged internals, balanced, headwork etc etc, with a view to turbo as well. I have probably gone massive overkill but I've been told that it will basically last forever if correctly looked after. Head's been ported, Forged Pistons, Fully balanced. Originally I told the engine builder it would run 12-15 Psi all day (Intercooled), It's en EFI TB42 which will have a custom computer and wiring as it's going into a currently carby'd dual fuel Maverick. Not sure what power to expect from this setup? Also should it run higher Psi? I'm after low down torque, a lot more power obviously but the key word was longevity.