Depends if they are 'original' fit wire wheels or bolt-on adaptors to the steel wheel hubs?
The adaptors, front and rear, can be transferred to a Minor, as can the front 'original' hubs, but the Midget rear axle is much narower than a Minor and will not fit, nor will the half shafts fit a Minor rear axle, as they are unique to the wire wheel Spridget axle, which itself is even narrower than a steel wheel Spridget axle.
As Matt says the spring mounting on a leaf springed Spridget is the same as the Minor, but the axle mountings are closer together, so will not fit the Minor.
Brakes:
Rear - the Frogeye definitely, and I think all 948 Spridgets, have the same rear brakes as a Minor, the later ones were the same size but used a double piston cylinder and rod handbrake mechanism - there is no advantage over the Minor.
Front - 1970 Midget has discs, and the hubs fit straight on to a MInor, but you will need special 'J' bracket adaptors to fit the calipers. Mini Mania in the USA supply the brackets you will need - see this link:
http://www.minimania.com/web/Item/DSK10 ... Detail.cfm
or contact me and I can send you the drawing of the same thing if you have access to steel plate profiling services.