Sorry guy but I just don't see where dropping the pan is all that much of a problem. You don't even need to disconnect an linkage or anything other than the throttle return spring. Seems to me pulling the radiator, side cover, lifters and vibration damper would offer more of a challenge than dropping the pan. Changing a cam in any engine has never been one of the simpler tasks in engine work.
Never did hear the logic behind why they did it that way, but I'm sure there must have been a good reason cuz it was done that way for a loooong time on a lot of engines.
Of course we're much better engineers than any of those that were employed at General Motors in the 30's, 40's, 50's and 60's, right guys?
Denny Graham
Sandwich, IL
