Lets have some fun!
Is this car seeing street and strip? And when I say 'strip' I mean 'regularly'.
Or is this a two or three time a year strip car and more of a driver?
Do you want to haul ***?
What I'm getting at is a mild stroker, especially based of a 340 block (416 to 422ci), could put 425lbs torque to the floor AND be a wonderful car to drive daily with a 4" stroker crank(or the new 4.25"!), only 9.8:1 compression, affordable RHS Indy X 2.02 heads (do some blending/porting maybe), and a mild duration cam with .500 or so lift.
You could potentially get this done for $4500, give or take, if you shop around deals.
Procharger's are nice, but not always necessary.