If your father was a hot rodder! J2 Olds was one of the original muscle cars! Olds powered g***ers! I'll start, seen at Watkins Glen:
The top performance V-8 until Chrysler Engineers introduced The Bomb. Must have been nice to pull ahead of Flatheads and Stovebolts. ROCKET OLDS.
Shouda just paid attention to existing threads: https://www.jalopyjournal.com/forum/threads/oldsmobile-kustoms.65920/
My dad's '55 in the mid 60s ... He fabricated headers and a log manifold that ran 4 - 94s and did some mild customizing!