1500USD to build as much horse in a 360 as possible. What would you do?

It's most often the young guys that add the bolt on goodies, especially loud exhaust. Then they start poundings on the throttle like they are stomping out a fire.
They dont realize they're stretching the timing chain and just begging it to fail.
I know a guy who spent 600 on new heads for a chevy 350 in his work van.
The bottom end came apart before he got out from under his shade tree.
My suggestion is contiune saving. Build a complete engine.