I'd never stretch tires or mess with the alignment that much. I think it looks "interesting" on a show car or cruising the boulevard but, as Chuck said above, it's not safe at normal speeds.
But I can remember raising the rear of cars and sticking way-too-big-for-the-rest-of-the-drivetrain tires in there, back in The Good Old Days. Not as unsafe as stretching, but it still had a negative effect on handling. Glass packs were pretty popular, too.
I'm still impressed with the work OP has done. Looks like he's doing it right (other than the tire/alignment thing) even if it isn't easy on my eyes.
