You don't have to match the case. It will run fine without matching. However, when you do match the case it will perform slightly better.
The booster-ports in the piston are mainly for cooling and lubrication. They were there stock, but they were pretty small, so I matched them (roughly) to the ports in the cilinder.
I ran a 74 jet with 15mm Bing, Biturbo and modified stock filter. So I think you should be around the high 70's, low 80's. Depending on how hot it is there. Shall I throw in a 78 jet for you, or something? ;)