Just thought I would update this thread, I decided to replace the whole lot and found a good deal on a new Castle Creations Sidewinder SCT combo (3800kv) and I must say so far I have been very impressed.
Very cool running with fans for both the Motor and the ESC, much better battery performance than I had with the stock velineon kit. I have changed the gearing so I dont know if its any faster than before but it most certainly feels more driveable.
The real test comes tonight at the SRCMCC race night to see if I go any better than last time out!! Watch this space. So far though I would definately recommend this combo for SC trucks