I once again chickened out on the check-valve install. 2psi of suction required to crack it that far from the mechanical pump, and on the pump inlet side makes me nervous. I did, however pull the fuel line off the tank and lo' - no sleeve! I put a sleeve on and she seemed to catch quicker than normal. Of course, this is with the fuel line mostly drained to the pump since I had the line off so that's a good sign. I'll report back after starting her when she has sat for a few days. If the sleeve doesn't work I'll resort to the check valve.
On another note, I know my gas cap is sealing, when I leaned on the tank to reposition the hoses temporarily, fuel came squirting out of the pickup tube as I compressed the tank! Now that I think of it, this probably isn't a good thing. The pump is pulling against a closed system. Is the fuel cap supposed to have an internal vent?
M