4l65 in a 98 z28.....
#2
It should work just put a 4l70e came out of a 2008 trialblazer ss had to change the rear tail housing think that's what its called. OTher than that everything else bolted right up
#3
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You will want to swap the linkage shaft as well but physically the trans will bolt up without any other external changes. I would recommend installing a shift kit to tailor the separator plate, the accumulators and also I would install a vet servo. Personally I have been using the sonnax kit in these units and have received some great results. I would add to their kit a set of abuse plugs for the valve body and a hd 2-3 shift valve to make a nice well balanced transmission. HTH Vince