try fitting an SR bellhousing on a CA18ET/CA20E s12 200sx box. If you can, get an 1986-88 transmission (stronger than the 84-85 ones). Its a much smaller tranny, but it'll take s13 bellhousings. I run a KA24 in my s12, and all that I did was swap the s13 bellhousing onto the smaller CA20E tranny. It also uses a mechanical/cable speed sensor that is smaller than the electronic one that s13's use.
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