hydraulic clutch in A body

Yes.

There are a lot of ways to do it. Some folks are using a hydraulic bearing, while others are using a pull type slave cylinder.

The formula you are looking for is a 7/8" master cylinder, with either one. The pull type gets you away from the bell/ exhaust and allows you to keep the fork and clutch assembly the same.

I'm going to do the pull slave, even though the hydraulic bearing saves more room. I like the idea of being able to replace the slave cylinder without removing the trans from the bellhousing.