Many aftermarket or replacement MCs will work fine. The bleeders aren't necessary for brake action, they just make it easy to bleed out air that may become trapped in an angled MC. I can assure you that the 5460465 will work as that is what I used when I replaced the parts store Bendix MC on my power drum brake '67. BTW, that one without bleeders had worked fine for years back in the 80's when the car was a daily driver. I did the same reading you did and was also confused by the pictures showing non-bleeder MC on a power booster but came to the same conclusion that Kurt pointed out above. Not sure the AIM even clearly shows bleeders. But pictures are just pictures. Data speaks and certainly Kurt and the CRG have the data. Unless more data surfaces, I'm convinced my car came with the 5460465 casting from the factory. Finding a good one or a good rebuildable one may be a challenge, though.
