RB and 6inline both not so guda guda in 316 chasis, today i met a guy who wanted to put 6 inline in corolla 82. i suggested him too stick with 20v ,,n/a,,,small lightweight and fits better with car's wheelbase. if yr going for whellbase mods too, then why not get a car with bigger wheelbase to start with why corolla or 316.. low end torque can be varied by backpressure too and you still get better acceleration in city driving
to solve diffrential Hp drawback,, supercharge 20v to 4 - 5 psi