Vacuum bleeding any modern or antique brakes with a professional bleeder tool like a Vacula brake bleeder- $300.00 , it's fast and easy but require's a compressor and using it right.
Hand held trigger type bleeders work but are slow and sometimes don't pull enough vacuum to do the job properly. Pressure types work well and will get the job done-bubbles stop coming out the hose you're done.
So...as per the book- When beginning to vacuum bleed a wheel cylinder with either a hand held or canister type bleeder connect the vacuum suction hose to the closed off bleeder screw. Build up vacuum in the tool, then open the bleeder screw to vacuum bleed the cylinder and line.
When you're finished vacuum bleeding a cylinder you close off the bleeder screw with the bleeder tool still reading high vacuum and still sucking fluid.
Open the beeder screw only a half turn-prevents excessive suction of air around the bleeder thraeds. It's normal to see bubbles in the suction hose even after more than 2-3 minutes of vacuum bleeding because of a small amount of air being sucked around the bleeder threads. This is normal.
Vacuum bleeding fails to do the job properly when you disconnect the vacuum bleeder hose from the bleeder screw without closing the bleeder screw first. A very small amount of old fluid and air sucked out will be pulled back into the wheel cylinder or brake caliper.
I myself use both pressure and vacuum type bleeders for brake jobs. A pro shop canister type vacuum bleeder works very fast and can be used on DOT 3,4, and 5 systems with out worry of contamination. Just costs a lot of $$$. I prefer it.
Bob