Asking for advice

[luke]

I'm complete newbie with 1/10 ( I use to race the Losi xxcr,b3 17 years ago but slots changed) iv ran the sworkz 350 evo and loved that and been doing 1/8 got 3 years now making the change over to 1/10
What iv got is
S104
Dualsky xc850tf
Lrp x12 8.5t motor
2x voltz shortie 4000 mah batteries
Savox 1267 servo
I have the additional blue/pink springs
Il be using yellow mini pins all round 2wd stretched on to front rims
How does all that sound?
What run times ect can be expected out of a battery 2 runs per full charge?
Is the motor going to be competitive enough?
Il be going tcmcrc on fri nights then silverstone on a tue when I can then there sat meet too
What's your thought please