They were fairly common back in the day. I would think any local machine shop would be able to do it for you. Which one do you have? I know that they were rated by torque instead of cubic inch. I think the 445 was the bad motor scooter that they put in the Wildcats and maybe some riveiras. There was also a 410 which is probably the more common ones. Most of them say Wildcat on the motor but unless they came out of a Wildcat body or a Riv, they were not the 445. I have also been told however, that the factory used thicker head gaskets to lower the compression on the 410's and that you can use a thinner one when you have it rebuilt to get the compression of the 445. I'm sure the 445 had other mods as well, but that is all I know about. Good luck! These are good motors!
Out
Retroman