I would try MODIFIED! (Go fast and try no to crash). You need to rotate parts anyway.
There are a wider variety of mod motors, You don't have to go negative zero.
Get a motor that just exceeds your skill level. You will Love it.
The difference in stock you tend to try and over rive the slow speed.( a need for speed)
With mod you have to learn to hold back the need for speed and try to under drive because of the faster motor. And you will learn breaking and throttle control threw the in field. MOD racing should be called the BIG GRIN
class, because the straight away is FUN! I live for the straight away
MOD is what its all about.
Really would you rather watch a mod race? Or a stock race?
I've been trying to get some Mod started at or track. The other night they let me run my 5.5 with the 4300's and man was it fun.