Old school E forehand was followtru towards the TARGET, not straight ahead. Those old WilsonSS Medium 43/4's were easy 14 oz, hard to stop.
Nasty uses pure conti forehand grips, lots of wrist, and the rackethead has to followthru across his body. YOU try hitting conti topspin forehands. I know, because not only did I play conti forehand in the '70's, but my current right handed forehand is conti topspin.