I have most of the part to make a 511CID you can have the pistons noched for a good valve relief and be almost there. I'll send you the parts for $1300.00 Shipped

Crankshaft - 440 Source 4.250" stroke for a 400 block

Rods - Eagle 6.535" w/L19 bolts good to 1500HP

Pistons - Icon forged 4.375" bore (w/stock valve reliefs)

The pistons can be notched for the B-1 valve reliefs.

You would still have a pretty good budget left for the small things.