1989 Tempo timing chain replace

I have the 4-cyl 140 ci engine with about 90K miles and I'm pretty sure the timing chain has "jumped a notch" so I'm going to look at it and probably replace it.

From what I've read (Chilton), I have to drop the engine out the bottom of the car to do this and there are like 3 pages of "stuff" that needs to be disconnected.

Does anyone know if this is absolutely necessary?

:crying::crying::crying::crying::crying::crying::c rying::crying:

mike