Welcome to the club
Yes lots of parts from the w-body platform fit out cars (h-body), except the springs or other suspension parts. You can get a lowering kit from www.domesticperformance.com
for the bonneville, as well as upgraded brakes.
No one sells a direct bolt in cold air intake but they are easy to build yourself and we have many examples for your year.
You dont need a strut tower brace as the fire wall is integrated strut towers providing maximum support.