I wrote service for a time at a Chevy store in the mid-70s. Now and again, someone would ask about a tune-up for their Monza V-8. When I quoted them five hours (the front motor mounts had to be unbolted and the engine raised up to get at the two front spark plugs)I never saw them again.
Sounds about right.
Didn’t one of the earlier small GM front wheel drive models have to drop the engine “tray” along with the transaxle for some form of scheduled maintenance? Maybe the high performance model of the Chevy Citation?
I’m remembering something along those lines too, for some reason. Why GM ever thought anybody would put up with such expense for maintaining an American car is anybody’s guess. Heck, I won’t put up with it for a German car, lol.
Mechanics would remove the front tires and drill access holes in the inner fenders, then plug them after changing the plugs.
I briefly owned one of the V-8 fastback models - very peppy but the body was a POS.