Crate Motor

Personally I would buy a Scat forged crank rotating assy. Ibeam rods 7/16" bolts Icon forged pistons rings and bearings 1-48013BI
416 cu in 340 block
I found one on ebay for 1935.00 shipped
edelbrock heads, ebay 1440.00 shipped
felpro kit ebay 75.00 shipped
bore the block 300.00 or less
$3750.00 you would have a killer engine
you still need the basics cam, intake, carb, headers, dist and so on
but you need those anyway. This was just a quit look up you might find it cheaper if you look and this is just my opinion.