No problem! Good luck with the swap. I have a thread here from when I did this same swap in my red '97 C1500, might be some useful info for you in there. I'm assuming your truck is a 4WD though so you'll have more going on than I did, mainly the transfer case and front driveshaft.
https://www.gmt400.com/threads/97-c1500-4l60e-to-4l80e-swap.38819/
https://www.gmt400.com/threads/97-c1500-4l60e-to-4l80e-swap.38819/
