sure why not. Just mark them so they go back into the right hole. or the guide it was in. then you can take a wire wheel to the valve head area and decarbon them, check guide play......maybe even clean up the port a little while your there
Any way to check for bent stems or is it safe to assume that if they ride in the hole nice and smooth that they are fine?
I dont know if you noticed it or not but someone has already done some porting work, I dont know the extent. Maybe it was just a gasket matching, hopefully it was at least for this engine.