I wanted to learn how to do this myself, and while looking around the engine finally finding the spot, all i can think is, my god, how am I supposed to change the spark plugs on an LT1?

It is a PITA. On some of them it helps to use an extension and wobble joint through the wheelwells. I can get them all from top though.

Really not something I can give detailed instructions on, more of a dive in and gitterdone sort of thing.

I have changed them all from the top. #2 and #4 are a little tough, and might be more easily accessed from the bottom or wheel opening.

Changing the spark plug wires, however, is a different thing entirely. Plan on several hours just to route them the same way the originals were installed.

this is like pulling a transmission out of an S-10. if you got the money, pay someone to do it. it is a real pita. best of luck.

On my Caprice, the driver's side is not that bad. The passenger's side is another story. I agree on going under the fender... and removing the tire. I'll keep the jack under the car to lower and raise it as needed.

I use a long 3/8 extension, flex head ratchet, other extensions, a 3/8 swivel in various combinations. An old spark plug boot is good to get them started.

It takes me around 3 hours and I run out of curse words after the first hour and make up new ones.

Bob

On my Caprice, the driver's side is not that bad. The passenger's side is another story. I agree on going under the fender... and removing the tire. I'll keep the jack under the car to lower and raise it as needed.

I use a long 3/8 extension, flex head ratchet, other extensions, a 3/8 swivel in various combinations. An old spark plug boot is good to get them started.

It takes me around 3 hours and I run out of curse words after the first hour and make up new ones.

Bob

i agree to remove tire and get to some from under. because plugs last a long time i do the plug change at tire rotation/grease inspect front end maintenance time rather than special r/r for plugs. saves your back also.......you can get a good look at wire condition better when it is done this way......