what to do about pulleys? 331 stroker

Hi there, I have had mis matched pulleys for years now. They either don't line up or they are touching. I have several water pump and crank pulleys that are garbage. The problem is that all of my pulleys are 2 groove or 3 groove. I need 1 groove pulleys. i don' t have power steering or AC. All of the local junk yards have said that they haven't seen 1 groove pulleys in years.

I have seen march pullys web site and they list the following, This is for a 4 bolt balancer set up 1969 1/2 to later;

1 groove crank 5 1/2 inch
1 groove water 6 1/4 inch
1 groove alternator pulley with cover??? 2 11/16 inch.

My question is does this sound right? Will it work? How about quality? How come 1 groove pulleys are so hard to find? Also why is it that the water pump pulley is bigger than the crank pulley. Any help would be greatly appreciated. Thanks once again.

Water pump pulley is bigger than the crank pully so the pump isn't turning 5,000 RPM's and cavitating the water when the engine is cruising...