An 88 ezgo is a resistor coil cart, so you are looking at bringing the drive system into the 21st century. If you like the cart it can be a very good option towards making it a more serviceable unit.
Lots of members have converted Ezgo and CC from resistor coils to solid state controllers.
Heck, I did for one old customer because he was burning up a speed wiper board every year on his steep property.
Simple controller pkgs start at $424 here
http://www.cartsunlimited.net/