Max IV belt, clutch, and chains

[brr]

I own a 1996 Max IV with a 18hp Vanguard engine. I am planning on replacing the belt, clutch, and chains. What is the original belt size? The clutch has no marking on it. What was the original clutch. What are the original chain length and size, rear, front, and primary. The person that owned the machine before me made modifications and I would like to return it to original. Any help would be appreciated.
Thanks!

[mfenmor]

This will get you started. They may not have all you need, but you can get part numbers and search.

https://www.max6x6.com/

https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=max+1092&_sacat=0

https://www.ebay.com/itm/REAL-COMET-Salsbury-780-Drive-Clutch-Vanguard-PUG-MAX-1-302405-converter-USA/142478865509?epid=1711826494&hash=item212c66f465:g:7TIAAOSwvQdcqg4n

https://www.mcmaster.com/7265K4/

Don't go by the chain length you have, count the links. Buy a roll, it'll be cheaper than lengths.