which distributor?

I have a stock mustang engine (1991) that I went through and was looking at possibly getting a new aftermarket distributor. If I go with an MSD, what part # would I need. I did a search through summit and they gave me like 10. Any help would be appreciated. Or is there a better distributor out there for the price, maybe crane or something? Thanks
 
Now any aftermarket cams I buy like the lunatis or the say a trick flow or TSF will all be a hydraulic roller cam right? Now I plan on running a 150 shot, is there any part of the ignition system I should upgrade besides wires and colder plugs? Thanks for the part #.