There are 2 rads for the sidekick. You need the smaller of the 2.Can't remember the exact measurement but I think it is 20 3/4". The oulets are the same as your samurai. As for mounting your going to have to fab up some brackets and weld them in. Pretty easy conversion. If you want any more info give me an e-mail.
87 Samurai, 92 fuel injected 1.6 ltr.,s.o.a., 5.13 r/p, birfield rings, 2" exhaust, 32/11.5 mud kings, breeze steering and missing links, 5012 up front with custom towers, toyota mr-2 seats, breeze trac bar, custom rock sliders and still going.