McMaster-Car sells a flush style grease fitting that I believe will solve the clearance issue some have with the Currie HD Steering System.
When installed only the Hex head of the fitting is sticking out by about 1/8".
Here is the info.
http://www.mcmaster.com/
The McM-Car Part Number = 10595K14
Description = 1/4"-28 Flush Style Grease Fitting
Print catalog page # = 1,984
Cost = $4.55 for a package of 5
Frank