the 6902 is 6 p.s.i. - no regulator needed, and is 1/4 npt thread so U want 2 1/4"npt male to #6 male fittings for in and out of pump. I do not run or think U need a pressure gauge. U need a #6 male to 5/8"-20 male fitting with gasket to go into the carb such as edelbrock 8087. and some #6 hose ends etc.
