Now that's interesting. First off, how is there incorrect info in a service manual? Especially one that old?
There's so many screwups in the paper-copy service manual set I have for my '88, that they had to release a Service Manual Supplement book to correct 'em, and I don't think they got 'em all. My '88 service manual has an '8
6 copyright date.
But, yes, I'm surprised that they carried-over that screwup to the '89 manual.
Secondly, thanks for the pic... ...A 78 T/A? Details, please?
Father-In-Law got a wild hair up his butt about working on cars. His wife had a '66 Impala SS convertible, about the only material possession she retained in the divorce from her first husband. Father-In-Law made her sell it. You've heard the phrase "Happy Wife, Happy Life"? About twenty years later, he bought it back, paid thousands of dollars to get bodywork done...NOW she's happy. That car hasn't been started or out of the garage for three years...but it's HERS.
In the meantime, he bought a '72 Buick Skylark Convertible which didn't interest her at all--it wasn't HER convertible. I ended-up doing engine work and a front-disc conversion on it. Then he bought the '78 (or was it a '77?) T/A. The P400 substitute engine was a mess. He, his nephew, and I built a P455 for it. The new engine immediately wiped-out the transmission. He got that rebuilt locally without my input. He bought tools, learned new skills...paid big money for what appeared to be quality bodywork/paint...really fixed that car up nicely.
The problem for me is that he wanted me to work on it at his place, and I disliked not having "my" tools and equipment to do it with. We never did get the Q-jet on the TA sorted out. Lots of pinging, I think the carb was overly-lean.
Eventually, he got tired of working on cars, sold both the Skylark and the T/A via some "Classic Car Sales" outfit, to folks five states away. At least he got his money back out of those two cars, minus all the labor.
DOUBLE EDIT: Nevermind. I hit "Refresh" about 17 times and your entire post, with pic, has displayed.
Some of that is probably the fact that I end-up editing my posts about fifteen times, and you quoted one of the earlier versions.
@Schurkey, I found this, too. I think you are correct about this Service Manual not being accurate.
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THAT ONE! The first steel plate against the block is what the strut bolts to. One on each side.