Hi Stewart:
My 76 C-20 2wd, 350V8, TH400 auto trans, has the following grease fittings:
1. Upper control arms(4)
2. Lower control arms(4)
3. Upper and lower ball joints(4)
4. Steering idler arms(4)
5. Tie rod ends(2)
6. Forward drive shaft u-joint(1)
7. Rear drive shaft u-joint(1)
8. Drive shaft slip joint(1)
This is 21 grease fittings...some models of 1976 may not have had #8 because of different transmissions. Some models may have a grease fitting on the steering shaft between the steering column and steering gearbox.
Regards,
Henry