At first I thought you were going to do a CB750 with clown shoes but reading through see you seem quite sensible.
That has last year 350 forks with disc brake, drum front wheel will bolt straight in if you wanted to change things.
If Windows 11 hadn't corrupted my thumb drive during an update I would have a ton of pictures of various local modded 350's/360's to give you even more idea's
The 350 your starting with isn't pristine but isn't totally disgusting so a very good starting point, tank needs paint, red to match truck sounds good to me..
The air filters have to go, they are too small.
Battery box, I guess you figured you need LiFePo but that is going to need an upgraded rectifier/regulator unit or battery will fail (possibly catching fire)
Personally I prefer battery mounted low and center, either on top of swing arm or underneath if you fabrication skills are good (Suzuki did it with VS750/700 in the 80's, it was in production until 2000's) If your ditching electric start you can fit a much smaller battery, AD uses 4A/Hr lithium I use 7A/Hr SLA, much much cheaper
I can modify the carbs to run with K&N filters, without the mods it will run very rich somewhere around 3~6,000rpm during transition to secondary main jets.
The exhaust is way too short, the cam timing is very mild and really doesn't like short systems, you may not want a long system but could get creative?
mydlyfcrysis just started a thread on his resto-mod 360 from a few years ago with some useful charts and ballbearian has interest in wheel building as it's the best modifications you can do.
Steel rims seem unavailable at present but 'classic' cafe racer rims in alloy are just better (plus cheaper and lighter weight)
I also posted a picture of a 360 cafe I built several years ago that was on display at Ace Cafe Orlando,
Anyway, welcome, we are always interested to see new members with new idea's. Coming from car world may make it even more interesting?