Hi Cindy,
It's been about 20 years (literaly) since I owned a Midget, but as I recall, the bonnet release is similar to the B-GT that I have now. (someone correct me if I'm wrong)
I was having trouble with the bonnet release on the '74.5 GT I'm trying to finish, and was not having problems on my '74 parts car, decided to swap them, and found a possible fix for your problem in the process.
Long story short, I ended up swapping only the cables. '74.5 didn't have a knob on the cable end (broke off), '74 did. Couldn't remove the housing without first removing the cable, so I left the housings in place.
Try this:
Once you get your bonnet open, loosen the retainer on the cable at the latch, and unthread the cable from it. Then, pull the cable completely out of the housing.
(The housing is flat wound, and not watertight. Over the years lubrication washes out and rust sets in; especially at any tight turns in the housing or at pinch points.)
Using a Dremel tool or something similar, carefully grind/file/sharpen the end of the cable to a point, being careful NOT to separate the ends of the wrapped individual wires.
Wipe down the cable, cleaning off any old grease, dirt, and apply a thin layer of wheel bearing grease or similar lubricant.
Reinsert the cable into the housing. (here's where that pointed end comes in handy)
All that's left is to reconnect the cable end at the latch, and it should be as good as new.
I did basically the same thing I've just described on my car about two months ago. Before I did this, it took both hands pulling rather firmly to release the bonnet. Now I can release the hood easily with a couple of fingers.
Hope this helps.
Mike /ubbthreads/images/graemlins/patriot.gif