383 Block/Crank/Heads
You'll be looking at more expensive headers, possible swap kit unless you can weld, shortened drive shaft and for a real powerful engine, a rear end up grade to a 8-3/4 min and at there prices, a DANA 60 for a few bucks more would be a great idea @ around $2000.
It would out perform the 360 on a similar parts build. It's a short stroke engine and it like to rev.