Max boost a stock 300 can handle

[Anonymous]

Alright, I gotta say im new to the whole Ford I-6 scene. I recently bought a 1939 Hudson with a 300 I-6 that seems to be completely stock with a 1 barrel carb. I was first thinking of swaping out the motor for a 302, or a fully built 500 Ci cadi v8, but I want something unique that mixes old and new(er) technology. Ive decided to run a T4-V1 turbo with a .70 A/R, four barrel carb, and a full 2.75 exhaust. My question is, how much boost can I expect to put through a stock 300 HD motor safely? Thanks