erm.... actually the s14's iirc are close to 52/48 f/r weights and the s13's are even heavier in the front..... not sure how you rationalize calling that "ass heavy".

A RB25 pushed a s13 to 55/45 f/r ratio, usually they are around 53.5/46.5 or 54/46.

By no means are they ass heavy.... with SR's are just about the only way they get down to 50/50 and thats after being stripped and possibly ballast in the rear.