So now I post my engine questions here, there seems to have been a transfer in knowledge!

I just picked up the above engine for a song. When putting it on the test stand, I was looking for the tank pressure nipple off the exhaust...! There isn't. I got confused!

I have searched, but haven't found a whole lot. I understand that the fuel draw from the carb alone is sufficient (due to the smaller carb). Is that true?

If so, then I just use one tube from the clunk in the tank? No other line open? If so wouldn't a vaccum develop that would, as the fuel is used, make it harder to draw fuel?

Would it make more sense to drill and tap a hole from the muffler?

Performance isn't required from this engine. I plan on using it on a mini pizza SPAD, it won't be flown far away as I understand that the glide as well as a brick.

Thanks for your help!