US vs European Izh-35M Differences?

I’m trying to get left handed grips for my US Izh-35M. I thought the only differences that would matter in regard to grips were the side button mag release and manual safety on the left side.
I understand that the US version also has a grip safety, but I didn’t think the dimensions at the rear of the frame were any different. (True?)
My plan was to simply convert the mag release to the European-style bottom release and relieve the top left side of the grip for the manual safety. Are there any other differences that would matter regarding fitting a set of Euro-spec lefty grips to my US-spec Izh-35M?

I would not buy an IZY unless you can get 2 because parts are super hard to get.

rich.tullo wrote:I would not buy an IZY unless you can get 2 because parts are super hard to get.

Thank you. Do you happen to know the answer to my actual question?