Scepterman should be able to help you with some information. Till he shows up I'll try to humor you. I think you are going to need the A Base cams for your draw length. If you want a little better performance you might even be able to use mini-mods.
I wouldn't count on the string and cables being the same length. They might be, but I seriously doubt.
If Sceptermandoesn't show up then I'd suggest LeEarl on
www.archerytalk.com.
In fact that's where I'd start my search for the cams and mods if I were you.
And for your info I went through all the Bow Cam charts looking for the Scepter/M50, but o no avail.