it’s a pretty neat mini, has a Briggs 5hp on it now, was looking for a yard rider as my Rupp is a bit more of a race mini. Chain will definitely be quite long so we’ll see
I looked some more, I know I had a shot of one of those, but I lost a lot of photos/images unfortunately. I have what I think is the other side of the 3 fold brochure you could maybe find it in. this may show up small ( I tried to blow it up) showing the small wheeled 250 TC model, and to the left it states the 450 TC model (what I assume yours is). Note the fork design, tank, fenders, etc..
Here is the Model 500 with the Hodaka on it out of one of my Mini Bike Guide magazines, They made a really cool one called an MXH with a mono tank/seat/rear fender design too. The 500 look sto have had fancier ceriani type forks on it but was still very much like yours.
I would get a bolt on TC system for it, since your remote tank you briggs has room for it. that would get you chin run down and more appropriate to the suspension pivot point. Looks like if you reconfigured the exhaust you could get your engine farther back n the frame as well.
Good luck with it, hopefully someone has the other side of that brochure saved in their files and can load it up for you.