An M130 engine... 
No, no and once again no. Having said that the next off road event it is going to will be sand, that might show the need for more power.
I have not seen any M130s for sale in the UK but in the US they seem to be $2k upwards plus the "fun" of fitting them. Would the money not be better off going towards other equipment or even a 406 with hydraulics (bearing in mind it is an off road toy that spends very little time on road)?