Yea get an si harness and do what drifterextreme says, the conversion harness would be nice but for me it would of doubled the price of this swap and it was in a wore out crx so i just did a hack job!
i've got a chilton's for the civic if you need a wiring diagram. otherwise i'm sure they're all over online. good luck. I hate fixing wiring issues almost as much as I hate doing anything at all with plumbing. =D
ALL TH400's have the exact same size/spline count on the input side. The only other trans that used this size was a few select Muncie transmissions. Ex, M21 & M22 (rockcrusher).
