QUOTE(sportlicherFahrer @ Feb 28 2022, 02:39 PM)
Did more digging, and it looks like the center section of the hub where the bearings are installed is physically not deep enough by .426" to fit on a 914 spindle. On top of that, the rotor thickness new for the bug rotor is the same as discard thickness for a 914, so the caliper probably wouldn't be too happy. Don't think there's a way to easily make these work on any -4 914.
Nice! Where did you find the detailed info on their hub design?
I know these are for VW Type 1 applications and thought that the early 70-71 914 used the same discs. I did read that a change was made in August of 71 because they found that the thinner discs were flexing under cornering. The change was a slightly thicker disc (11mm) and a thicker, reinforced hub (the .426" dimension).
As for rotors, I am pretty sure the the CB bolts rotors from a Ford product to their hubs for both front and rear applications. For the fronts, they got fancy with the cross drilling.
Back in the day, the easy way was to use 911 front suspension parts. Now those are more difficult to come by. I'm half tempted to design my own hub and bolt up a rotor if there is interest.