TBH finishing position in the UK short course Nats is just a case of showing up at enough rounds...(I came 2nd in 2wd last year so thats point proven)!
Borrowed a 4wd Durango for the start of this season, it is fitted with a Tekin Pro 4 4000KV which is rather good! Loads of grunt and good straight line speed coupled with 540 can size