[1970C10truck]

I pretty much figured with my luck that the clutch is probably wasted. Can anyone recommend a decent replacement that isn't going to totally break the bank. At this point it is Probably going to be kept for a temporary long term solution until I can come up with an automatic. My last truck was only driven about 200 miles in 3 years so its not like I need something for a hard used daily driver. Also checking out clutch kits I noticed there are several sizes available from 10 to 12 inch. What's the easiest way to determine the size I need? Sorry to sound so dumb but this whole manual transmission thing is all new to me