I'd go with a B16A tranny. The shorter gear ratios will give you better acceleration. However, if you drive on the freeway a lot, you'll find that cruising at ~70 mph will put your engine up close to 4,500 rpm. This isn't a bad thing, but some people get scared...
Or annoyed by the gas mileage/ noise while cruising. My tranny is at like 3-3.5 at 70 and the engine makes enough noise.
Who's car is that in your avatar?
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Turbo December 2005
Merry frickin Christmas
youll want either another tranny form an LS, because of the gas mileage and lower cost of the tranny itself, or an early SIR1 b16a tranny with an LSD. more expensive, but the lsd is very nice to have.
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Yes, there's a "Replacement for Displacement". Its called Volumetric Efficiency.