Speedway sells a kit for the '49-'54 Chevy cars, and '47-'59 Chevy trucks, to convert either to disc brakes. No spindle change required.
Another option is putting together your own kit using GM calipers, '83-'97 S10 rotors, and a Speedway caliper mounting bracket. It's a bit of fiddling, fabricating, and reworking the Speedway brackets. But it will save some money vs. a complete kit.