400 stroker or 440

This is a street car build with maybe a run or two at the track. I like the idea of a bit more room and weight savings Plus the Stroker package. The reason I dont stroke the 440 is if I dont have the stuff to do a 440 stoker. But a 400 stroker I can use my LY rods and steel Crank for the 400 and sell my 440 pistons and buy 400 stroker pistons and not have to spend to much to get to the 451. I hear so much about the 451 stoker I dont believe I would gain much power over the 440 though?

About the same power but smaller and lighter block.

Think of the 451 as a 440.