Welcome Gary,An Awesome car you've got there.A vert rare one at that.I LOVE IT!!!!.Now Cecil,if you could only get motivated and take a break from playing with those flying vehicles of yours,that 2 Door Sedan Impala of yours could look exactly or close to that!!!
Probably the 656 truck block, but for the right price maybe even the 63 engine, both are rebuilt, just need a cam for the 656 and both need heads installed.
For THE MAGIC 409, that's a different price yet. Still need the 586 heads though. Clyde? Phil?