I have always used the original ring but Hokie gave you good advice. As far as the pump, for yard driving fix your carb. and runability issues first, change oil and keep a nose instead of an eye on it. when it comes to your final road worthy product spend the money they are not really that much and get one through Ames. The main difference you will find with oe style pumps is with or without a return line. Also on your brakes do not get the big scissor all in one tool it is cumbersome and sucks. get the one piece return spring remove and install tool and also a separate hold down spring tool, get the one that has a flippable head for 2 different diameter springs and you will be able to use it on modern vehicles also. On your brakes was the thrust washer missing on the small end of the adjuster ? they often are from former hack brake jobs done in the past and will cause the adjuster to bind in the future stripping teeth off the wheel and ruining the self adjusting feature. What did you use for lube on both ends of the adjuster? oil is ok but white lithium grease is best just don't over use or when the brake heat gets to it it will find it's way on the shoes causing locking problems. Don't use regular grease as it's to thick and will bind when mixed with brake dust in the future. Also take some channel locks and close up your return spring ends a little. Lastly if your greasy paws left marks on the shoes sand off before you install drums.