how much psi can you safely put on a f2b swap with stock internals, 5psi or more?

 

your major limiting factors are the engine internals and the driveline (clutch, 'gearbox,' axles)

the limitations of F22 on boost has been well documented. if my memory serves.. 7psi is good and reliable more than 10psi is dangerous.

you can find info on the max holding torque of your clutch kit from the manufacturer.

i'm gonna guess all b-series transmissions and axles can handle what a stock-internals F22 turbo can put out. all assuming everything is in reasonably good working order (no excessive wear or mileage)