510 would fare better with a KA.

the 510 chassis is not as accepting of power as the S30 chassis is. so you will subsequently need a cage, as your transmission tunnel (as source of chassis stiffness) will get cut open to fit the larger 71C trans)

KA and SR are popular in 510's intercooler piping needs a bit of forethought if you decide to go turbo, but not impossible.

check out the california 510 boards and youll see an abundance of ideas and things done. VG, SR,KA, L, rotary etc.