Mostly because I just spent the last 3-4 hours changing all 6 spark plugs in my wife's Avalon.
First time I've ever had to remove the wiper motor/transmission and cowling for spark plug replacement.

No need to explain how easy that is with either a 223, 240, or 300/6.

And if we just put the valves back where they belong, right next to the pistons, plugs changes would be a breeze no matter the engine. And no more bent pushrods!!

Cosmo, done venting.

 

DITTO. My '96 ranger with a 4.0 was due for new plugs 100k ago. I'm afraid to touch or remove anything to try. Too much plastic starts breaking.

 

I had a '96 ranger...bought it new and really liked it. I don't remember having to remove anything to get the spark plugs. I did use universal joints and a few different extensions.