Offsets and spacers.... How to figure Et's

[GermanlookT3]

205's on an 8 are essentially zero stretch, 195's are a little stretch. The brand of tire is going to make a difference too. some tires run a little wider or narrower than others. Profile is also going to affect stretch, not so much in the actual amount stretched, but how stretched it looks

Ok so does anybody have any tire recomendations?
I believe a 195/50 will work great. The Wheel is pushed out an inch and that puts the Very edge of the lip right at the fender line. Seems like it would be atleast a little stretch. What do you think?