What I know of brass sleeved wheel cylinders comes from three guys I worked with (at an antique auto restoration shop) that had previously worked at a different shop that also brass sleeved wheel and master cylinders.
They commented that a fair number of them came back for rework.
And most importantly they had a few occasions when using the brass sleeved cylinders on vehicles they were working on in the shop... seems occasionally the cups stick to the cylinders then when you step on the brake nothing happens. Ended up with one car run into a wall when the brakes didn't work. Only explanation they could come up with is the brass was the problem, as it never happened with cast iron. (and I've never heard of it with stainless)
At the shop I (and the three guys) worked at we used stainless steel sleeved cylinders and not once did we have a problem with them.
As far as splitting wheel cylinders when installing sleeves, a proper fit will avoid that, yes it will take a tad more patience and or skill.
So obviously take my advice on the brass with some skepticism, it's second hand for me, and 3rd hand for you...
But from my experience with stainless ones and using some logic I see no reason to use brass over stainless.
Grigg
