interchangability

So I jumped in on an impulse Ebay purchase of a bare Speedway Scarab frame. It is just the frame and rear swing arm. No fork, engine, handlebars etc... It is not my intention to restore this at all, but to use it to build something fun and a little flashy with a vintage look. That said what...

I got a yellow clone on a kart i bought. It has a header, intake adapter, and im guessing either a swapped carb or stock rejetted. It had quite a lot of metal in the oil, still runs, but i was really wondering if i can just buy another predator and swap the yellow clone parts over? The other...