A little voice in the back of my head keeps telling me EPAS is the way to go. Well, actually it's probably just @dobrostang persistent as a migraine! At some point I could be running 10 inches or so of tread if the insanity continues to grow, and I'm not confident enough to hack my steering column for a unit out of a 16 year old government motors car in a junkyard. I have been thinking about calling the guys who make this unit DCE EPAS Systems. I realize it could just be a rebuilt unit out of an old Pontiac but it has 55lb/ft of assist.I hear you on your back pain, I know full well what limitations it puts on gear heads. I’m 81 with 5 joint replacements plus a not too successful L4-5 to S1 spinal fusion.
A couple of years ago I did the 200 dollar EPAS mod on my 68 and to be honest, the under dash time was insignificant compared to the the work you will do under there putting in a hydro boost. Front driver seat removal is a must for us back issue guys.
Talk to the guys running autocross with EPAS and listen to what they say about it. Compared to any of the long out dated technology of hydraulic systems EPAS will free up a bit of HP, greatly reduce under hood temps and is virtually maintenance free.
The problem didn't show up until the commie pump.While I am certainly not an expert, but with an intermittent problem like that my mind immediately goes to a possible air leak. Do you think that during the heating / cooling cycles something in the system is expanding and contracting and allowing air into the system?