Autotrans Interceptor universal?

i found an autotrans online used, but is from a pontiac bonneville 3800 series II motor. i thus far understand that it'll only work on autos with a 4 speed, so being the autotrans came from that type of vehicle, would it work on my 99 z24? i checked the webiste and they listed different models of the autotrans, specifically the bonneville has a 4t65e and the cavy has the 4t40e. are the tranny plug sizes the main difference? thanks in advance everyone please help me out.