What A-body did this 8 1/4 come out of?

Thats the answer I was mostly given when i asked a ??? so I took the advice... now have said FSM and its a wealth of information, most of the questions I see can be answered by the FSM. So now its an issue? Cant win.

C'mon man.

Yes, the factory service manual is a wealth of information, and would provide answers for A LOT of the threads on here.

But, it's pretty obvious what's going on here. And most of the 10x you've posted "maybe a FSM would help" it actually WOULDN'T.

Which is what I take issue with. If it's in the FSM, awesome, you're actually being helpful. But if it's not, well, we know what opinions are like. And since I have quite a few factory service manuals, yes, I do have a pretty decent idea of what you can find in one, and what you can't. And your post about the FSM in this thread? Well, that info isn't in there. So, yeah, the FSM wouldn't help. Otherwise I wouldn't be asking SG if the 8.25 really is 51.5" flange to flange, because I'd already know what was in the FSM I already have.

So, can we keep this on topic?