Have you anyone who has experience with 1/5 petrol or maybe a member off here could go and look with you as if it's a trade and it's as good as it looks in that picture it could be a good swap!!!
Don't be scared of these and there is plenty of advice from experienced members and ask questions even if you think there dumb as we all had to start somewhere.
Also check out YouTube it's your best friend and I've learnt so much stuff and now build my own engines and I never dreamt in my wildest dreams I would ever do that so if I can do it you will do.