who uses 62t cylinders?

[Matt_E]

Do you mean the larger sleaves of the 61x cylinder?

No, I was responding to your question as to what needs to be done for the X cases to accept T cylinders.

From what I saw, it would cost almost as much to bore out my 61x cylinder, as it would to get a 62t case and manifold

It would cost you 60-100 bucks to bore out your cylinder, and it would cost you $300-$700 to get T cases and Manifold.
Granted, throw in new pistons, and the bore job ends up being $300, but you get the point.

The only thing I am certain of, is I want to stay with a single carb, and my factory B limited pipe, everything else is up for change, which is one of the reasons the 62tcylinder/61x case got my attention..

There is only really good reason why the T cyl/x case engine is good: It's cheap.
More power can be had with T cases and X cylinder.