Wanted to make a separate comment for recommended upgrades/projects. The previous owner appears to have manufactured some sort of riving knife/anti-kickback pawl system which I've honestly never seen. You also have the 2 nicer cast iron wing extensions - mine has one side with the stamped steel:
Crosscut sled. This is a great way to use some scrap plywood and finally get some accurate square cuts. You'll relegate your miter saw to rough cutting after building this. Miter slots are the standard 3/4" width.
Paste wax on the table top. Helps prevent rust and easier to slide your work piece across.
Zero clearance insert. This not only helps improve cut quality, but more importantly for safety as cutoffs don't fall into that gap on the stock insert. I recommend getting the phelonic ones by Leecraft, and Amazon sells them for $30-40. Make sure you measure the size to fit before you order. I got this one but again, it might not fit your 113 - don't go by model #, measure! You can also make your own out of plywood but it may not stay flat.
A paddle switch, something like this. Again, safety here. I can't see what your saw has but mine came with a literal light switch. This can be accidentally turned on when you don't want, and the big "OFF" paddle lets you kick it with your knee if both of your hands are occupied.
You can replace those feet with casters. Make sure you get locking casters, and if your saw already feels tall then go with smaller 2" ones. You need the ones that have the through bolt like this.
Make sure the blade adjustment wheels turn easily. If not use some lubricant (not grease!!) that won't attract sawdust. I ignored this on my saw and struggled to turn the handles so much they snapped off. I bought these beautiful cast aluminum wheels on eBay to replace the plastic ones. More importantly I took the arbor assembly apart for a much needed lube and cleaning.
I haven't but many 113 owners have replaced the stock stamped pulleys with machined ones + link belt. This helps with vibration.
The single best upgrade is the Delta T3 fence but it's pricey at $225+ (the price fluctuates). You'll grow to hate that stock fence as it won't align square and you'll spend so much time tapping it here and there. If you're considering this upgrade keep in mind at $200 + resale price if your 113 = you're close to the price of a used Delta 36-725 saw which comes with the exact same fence, and also comes with most of the nice upgrades I listed above.
Leecraft CR-2 Sears Older 10-Inch Belt-drive Zero Clearance Table Saw Insert (Colors may vary) https://www.amazon.com/dp/B0002898B2/ref=cm_sw_r_cp_apa_i_1EGmCbH2F0XD2
That's what I used on my Craftsman saw. Make sure you get a set of the micro jig splitters for which ever kerf blade you use.
Also you can check on ereplacementparts.com
You can get pulley's from this place. http://www.in-lineindustries.com/products/pulleys-belts/