I did a tuneup on a 69 (A body car) or so Cuda with a 383 once. I had to remove the alternator to change the plugs.

Changing the fuel pump on most any A motor cars was much easier if you removed the alternator from the early 60s through the end of the M body cars, especially AC cars.

Most of the modern trucks you pull either the tank or the bed to replace the fuel pump. Its not gotten any easier, that was one of many reasons I quit doing it for a living.Gene