Can anyone confirm what cc's/ci's it is?(Shindiawa t-25)
Logic dictates that it should be 25cc . I cant find any documentation on the web as to the cc's or ci's.

Also, the t-25 uses a slide/needle type carb is it acceptable for an airplane engine

I had one of those come across the bench, probably 25 cc it was not useable so scrapped. The slide carb would work but getting linkage inside a cowl on an airplane would be a problem.

You could swap carb for a sutiable size walbro.