What the F@#& was chevy thinking?

have a friend working on jaguars they have some crazy stuff also, timingchain tensionersare of a real stupid plastic design but are possible to change with engine in the car but it takes a ton of work,they also have some very overenginered transmissision mounts and more bolts bolting transmision to the engine than i have ever seen on anything else and very very hard to reach.

from my work doing exhaust i have seen some cars,cant remember what cars but its almost impossible to get to the exhaust manifold to exhaustpipeflange bolts,nevermind trying to get some good heat at them to break them loose,making quick and easy work very timeconsuming.
if i had a factory manual for some mid 90´s camaros i would realy like to know how to replace the exhaust from the cat back with a real stock GM system without taking the whole rear suspension down,not that i have done any like that but i know they are one pice. yep gm has some fine engineers..