Looks like a nice litte pile of fun for you! I love G1's, they are the 57 Chevy of golf.carts (to me at least). Looks like your clutch ramps need replaced for sure. Most of us take out the exhaust butterfly valve, it can be removed with a couple screws. Another thing, for more speed and power bypass the governor and run the cable straight to the carb, these carts will fly. In stock form you can get 20-25 mph easily.
Check out the "sticky" "Everything G1 for newbies" lots of info there.
https://www.buggiesgonewild.com/showthread.php?t=76176