I would recommend getting the pistons first and then boring the block to size. Use the best ARP fasteners on your rods. The LY rods are better (lighter) than the "6-pack" rods.
I'd go straight to the Stealth heads, look for the thread on here about their flow #s. Those & flat tops near zero deck will allow 10:1 or better depending on cam overlap. Advance curve will likely take some tweaking, especially with iron heads. Match the converter to cam/gear/weight (call Dynamic).
Put some tire under it!