Can I use the 795 channel balance instead of the 765 channel balance?

Thanks for posting. It definitely sounds like you have a Series 795, not the Series 765. We see different stamp code systems for balances than what we have from time to time. What you'll need to do is obtain the exact weight of the window sash that uses these balances. On the shop page for the S795-27, look under the product description. You'll see a table that shows the weight ranges for each stamp option; once you know the exact weight of your window sash, you can use that table to choose the correct replacement stamp option. 

It would be best to use the 15-195B Open Cam, if that's what you have. These are sold separately, but the video below shows how to replace them; it's a very simple process. 

Let me know if you have any further questions. 

Thanks for getting back to me. Do you have any undamaged shoes you can pair with the balances? If so, I think the best thing to do would be to assemble some of the undamaged shoes with your balances and test them installed. If the sashes don't lift at all and can't stay open, then the balances in fact have to be replaced. Otherwise, you could get away with just using the 15-195B to replace any broken T-Lock Shoes.