Because of low vacuum, use of cannister that didn't solve the problem, and even a vacuum pump for awhile, and still brakes that didn't instill confidence, I contacted Wilwood for my conversion. Speaking with the tech at Wilwood when I ordered thier discs and calipers front and back for the conversion on my 455 76 TA I was advised to go hydraboost since I decided not to go manual. By the way I like both. I bought the Vintage Speed Reaper System (Tallon Hydraulics??) out of MI, and installed it 2017. Wow, seven years already! It came with the Willwood master 260-8556 with 1 1/8 bore size for my application, proportioning valve, and a CNC mounting plate and etc. The install was a direct fit and relatively easy but instead of using the included lines and fittings that needed to be crimped on, I opted for professionally made-to-fit lines from a local hydraulic company. The system has been flawless and a night and day improvement, and great confidence. More sensitive than the original set-up but not an issue. Just my two cents to hopefully help.
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