82 GMC Sierra 350TH AT Swaped for 700r4

My 350th was swaped out for a 4L60E Transmission. Where my speedometer cable should go is a 4 prong plug instead of thread style. Can I convert? Details please?:banghead:
Thanks David

Here are two websites that should have what your looking for.
http://www.tciauto.com/gm/gm_4L60E.htm#components
http://www.transmissioncenter.net/highperf700r4.htm
Good luck!