I could only find 27 grease points... does anyone know where the other 4 are?

Clutch fork and throw out bearing

 

Upper and lower kingpins - 4
Front springs, one at the front, two at the shackles - 6 (Most springs are non-greaseable)
Tie rod ends - 2
Drag link - 2
Front s-cams - 2
Front slacks - 2
Clutch pivot block at firewall - 1 ( i series do not have this)
Steering shaft ujoints, one at steering gear, one under steering column or at firewall - 2
Steering shaft slip joint - 1 (sometimes it is non-greaseable)
Trans cross shaft for release fork - 2
Clutch release bearing - 1
Ujoint at trans - 1
Ujoint at hanger bearing - 1
Slip joint - 1
Ujoint at front diff input - 1
Interaxle drive shaft, two ujoints and one slip - 3
Drive axle s-cams - 4
Drive slack adjusters - 4
5th wheel pivots - 2(Holland) (could be 4 with Fontaine)
Some air ride seats are greaseable - bonus
Some sector shafts on steering gears are greaseable - bonus

Not all trucks are spec'd and built the same, and therefore do not have the same number of grease fittings.

 

Some trucks have a zerk at the power steering box.

 

I dunno bout IHC but KW also has a grease fitting on each hood hinge at the front...

 

The European trucks only have a hand full of grease points.
When we first got them we were convinced things would wear out in no time because we were used to greasing everything on our American trucks.
We even drilled and tapped point so we could routinely grease.
In the end we found that the sealed non grease able parts often outlasted the grease serviceable equivalents.