the pcr version has mods by paul coleman, but not the actual pcr components. look at the latest rc car action, they have an article comparing the 9.5 violator and the hyper 7 pcr. go to www.ofna.com
and you'll see all the pcr aftermarket hop ups - it ain't cheap, but super durable.
as for the rtr radio, i chucked it. i wanted the pbs chassis, and it only comes as any rtr. the servos suck, that would be the first thing i'd change.
btw, the engine has real tight fit between the piston and sleeve, the starter box the kit comes with doesn't generate enough torque. besides, i'd invest in a good starter box.
once you've got the engine broken in, you'll have a real nice engine. i put on a rb c-5, and yeah it's fast, but i also paid alot for it. the tsock hyper 8 port has alot of torque. add a waller power adaptor and a one-piece 086 or 063 pipe, you'll have quite a bit of power.
to sum it up : change the servos and radio, buy a starter box, and add the power adaptor and pipe. that'll keep you happy...atleast for a couple of weeks.