Motor selection

Well, i decide to sell my supermaxx (or at least alot of it), and now i'm making a basher. I noticed that my car is never run, only worked on and saved up for. Now, i'm gonna sell a lot of the stuff so i can pay for my new motors and batteries. soooo

My new truck will have
-12 matched, assembled side-by-side, 1.18 volt
-stock chassis, stock shock towers, stock bumper and mounts, and stock body posts.
-rpm a-arms
-GA 7075 bulkheads, may sell for towerless VBS
-UE 6 spy diffs, UE servo saver
-Ultramaxx tranny with alum case
-Ti skids

So that was just some info for weight.

Now here is some questions:
-I'm looking into the C50 line of motors, should i get a 9L? I'll be running a 51 tooth spur, also, what pinion do you recommend? I'd like to buy from you mike, i don't really want to deal over seas.
-I'm also looking for a center skid that covers the whole center of the truck

i'll post info that i may of forgotten