Hi new to this site, i have a 75 1303 and am toying with a 13b carb or turbo conversion has there been a lot of these done ? I had a look through the forums here but most people seem to be doing the subaru conversion.

the main reason i think you will find is that you can legally only have a na 13b in a bug in oz. you can have a 12b turbo but not the 13 as its above the allowable limit. although saying that if you can find an engineer willing to sign off on it it is possible but good luck.
the reason everyone uses the subaru is its also a flat 4 and fits quite well