I have a 68 olds 98 with the 455 rocket, done all the work myself.New wheel and master cylinder, one new brake hub, new timing chain gear and water pump, new radiator and heater core, new carb, 68,000 original miles.
https://www.youtube.com/watch?v=kQZV6q00sUc
She's a rocket..........
I had a 1972 Oldsmobile 98 with a 454 engine.
That was a most pleasant car to drive. So plush too. Could have lived in it if I wanted to. Good thing gas was cheap in those days though. It got about 9 miles a gallon.