I know is a difference in the rear wheel bearing but will it slip in the 914 hole? I will have the hubs and stub axles from the 74 911 so there should be no problem of them mating up.

If your talking about the backing plate for the e-brake yes it will fit. You only have to slot the bolt holes a bit.

I was taking about the hub, stub axle and a 74 rear wheel bearing. I thought the e brake set up would work.

Yes the hub will work , use the 914 , early 69-73 911 bearing - same bearing , on the hub you slip a 5mm thick spacer , then pull the hub with spacer up into the bearing as usual with 914 hub flanges . The 5mm spacer makes up the difference between the 914 bearing and the bearing used on the 74 + 911 which was 5mm wider than the 69-73 911 bearing which as I stated earlier was the same size as 914, hence the usage of the earlier 911 hubs in the 914-6 and the 5 lug conversions . I got my set of spacers ( 2 ) from Patrick Motorsports ( can't recall the part number off the top of my head ), fairly inexpensive . Hub installed as usual with a bearing replacement , freeze bearing , install, let it to come to room temp , then pull in the hub with spacer slid up to the shoulder where the bearing for that setup butted against , wheel side ( hub was frozen also to facilitate install ) , got a 5 lug setup with a hub centric hub , little ears that protrude from the center of hub. The guys that use the earlier 911 hub and the 914 hub can get centering rings from Chris at Tangerine Racing , he makes the ring from delrin and has good success from them . Back to the hub thing , as the 74-89 911 hubs are plentyful nowadays , it seemed the logical way to go, as well as the front hub rotor setup from that year range ( front 5 lug 911 strut setup ) also giving hub centric front and rear wheel hub setups. Good luck ....

Jack / Jaxdream