I'm thinking about a si-trim and about 12 psi, I'm gonna just ride around with the stock block and gt40 setup for now and get all the swap parts until its ready then transfer all the stuff over to the 351 and put it in, atleast that's gonna be the plan!It would be a fun little Tq monster...You have have a base for alot of power in the future. Not too mention if you wanted to throw a turbo on that combo and cram in about 10psi you would have well over 500rwhp and reliability.
Go with the 351w and you will not regret it...Then while you are having fun in the stock motor, get stuff together for a 408 stroker build with bigger heads. then BOOYA! tons of instant tq and power.