4L60E Transmission Interchangability

I have a 1997 Chevy C1500 4.3L V6 2wd. I removed my 4L60E Trans (M30) and bought a used GM Goodwrech rebuilt Trans. from Craigslist, it had 80K miles on it, It came with no Bell Housing and No Torque Converter.
After getting it home I noticed the input shaft was different. I have a 298mm 30 spline with a Pilot Tip, the CL Trans has a 245mm 30 spline. Everything else is identical, case also says (M30) like mine. Once I removed the pan it was a mess. So I tore this one apart and I have a guy from Aamco helping me put it back together in my yard after work
My question is, Can I just rebuild this CL Trans, find a Torque converter to fit the 245mm input and just bolt right up to my Truck or can I rebuild this CL Trans and just find a 298mm Input Shaft or whole 298mm Input Shaft/ Drum assembly and put it in this CL trans, then put on my factory Torque Converter and be on my way.

96 97 are the two years same group. electornics parts changed every 1 to 3 years on these.. its a pain.... can swap all the electronics and harness and PCM to match,