@Davedacarpainter Why do you recommend maximum motorsports?Sfc’s first. They’re a little bit of a pita to put in, but one of the most valuable upgrades out there (Maximum Motorsports is my choice).
17” wheels look the best.
If you intend on mid 400’s, yes, new transmission.
It wouldn’t hurt to upgrade to a 31 spline rear end, though you could probably just get by with a rebuild of your current differential.
Suspension? Holy cow there’s a lot you can do there. Depends on money is all. Lol
Brakes? Mike is the man to talk to. @Mustang5L5