Re: should a delco gear reduction starter #9000822 work on 3.0l
You need to take some pictures of your new starter, your old starter, and your engine.
I asked in your other post about you haveing a Mallory Gear reduction starter, Your reply was that it was black........... End of my comments.
As I understand it, Mallory stopped shipping that particular starter. Not sure why, But the 2 I tried to use on an 88 3.0L rubbed on the flywheel. We did install the standard BIG starter (not gear reduction) (also aftermarket, I believe Sierra) on and it worked fine.
Something to think about.