Yeah if the capacitor's spades are fine then you don't need a new capacitor, just a new slip-on connector.
I have two GEs with 175W 120/240V 4-coil ballasts and both use 13.5uf capacitors. The 400W 120/240V GEs from the 60s used two 13.5uf capacitors in parallel with each other (to make one 27uf capacitor). It's always better to go slightly lower on the uf rating that slightly over though since you'll stress the ballast.