Welcome aboard! I did similar through rose tinted spectacles (Montesa Cota 1975). Bit of a nightmare. Parts aren’t that readily available and (sorry purists) they can be a bugger to start. Depending on budgets and your location, I would 100% go for something newer. If twinshock, I would personally go for a TY175 or Fantic 200 (both have parts readily available). Or maybe a TY250 Mono if you want something marginally newer, easy for parts and good on reliability. And then you get modern and it all opens up….!!!!