I have read thru most of this thread, printed out (256 pages) but I still need help. All you guys must have bought every 50cc engine out there, I was left with a 40 size or 60 zdz. I bought the 60 zdz as my first gas engine. I know it is more than enough, but I am confused as how to mount it. Will the firewall be strong enough to support the engine even with a hole cut in it for the carb. Any beefing up tips would be greatly apprectiated. Also I have to shim out about one inch, what is the best way of doing this.

Thanks in advance.