That's what we've been worried about. Your carb has it's own pump. If it's hooked up correctly, it doesn't need a Perry pump to run it. However the pump in the usual Walbro is run from the changes in the crankcase pressure on a 2 cycle engine. There is a place on the Walbro pump where you can tap into to supply it with this pressure signal.

On your four stroke engine the crankcase needs to be vented to the atmosphere. It might possible work to have a TEE in the crankcase vent line but the best bet would be to get the carb that "TKG" suggests.

Enjoy,

Jim