well about the arm pump a good effective way to help is take a peace of pipe about 2 feet long witth a 3 foot long rope tied in the middle with a weight. hold your arms straight out and twist the pipe till the weight is all the way up and do it ten times. it make your fore arms go numb. it realy cheap. and it helps arm pump. no jokes
i would say to get some a- arms i bought asr +3+1 for 388 dollars and put yfz shocks on it for another 150 then bought g-force axle for another 200 and raced all yearr in quad c. it was my first year and i got 4th in my class. asr and g force axle are very good products, some people may say other things but i found out expensive is everything.
hope you take my advice