70ssclone

Hey guys, so I'm finishing up my swap ( 70 Chevrolet,lq 4,gt45,tu1 cam,3.31,275Dr,) my trans is currently being built with a brake . I was spec'd a 258 with 2b stator from circle d today . I'm curious about how you would go about building boost at the line.I'm not new to cars just new to turbos, do I need a two step? ( my system has anti lag) or can I roll to the line hold the tb and build boost against the trans? Thanks for any input I'm still learning