360 or 383?

I've started gathering parts for my 360 build. I have a set of domed pistons, a set of J heads coming and a fresh block. I haven't decided on a cam yet.
My dilemma. I found a guy that has a 1966 383 big block, complete from carb to oil pan, with a 727 trans, fairly cheap.
This is strictly a drag car, no frills. I'm wanting to go fast fairly cheap (comparatively speaking). I'm trying to lighten the car too. Is the added expense of a big block worth it? Is a '66 383 worth $400?