need help with 10l3 0val

[stabgnid]

i am new to this type of car and i wreck the other day at the tennis court i run at and i broke an axel housing i went to the drawings to see what i need to get and there are to different type there is an in line(the one i have ) then there is a offset my lhs only has the offset . what is the differance? and can i run two differant types? we set up an oval track on the courts and thats is what i run with this car i hope to race soon.
thanks for any help