That kit looks ok except with flat top pistons youre pushing the compression ratio limits for pump fuel. I would recommend that same crankshaft, hbeam rods and a dish piston that's forged. Any of the heads mentioned will work just fine. Yes, you will have to put a small notch in the bottom of each cylinder to clear the rod bolts. Its easier with the cap screw type hbeam(needs less clearance).
It is very easy to make power once the 4" arm is added and it will have better street manners. I exceeded my goals when I built a 408/360.
11.20s with mild ported eddies 10.7 compression, and a xe286 solid roller. 3200 pd street car. 3k stall and 4.10's.
w-2 heads have more horsepower potential than the other heads mentioned imo.