I am trying to sort out issues with my 56 Ford (car) with a Gearheads power steering conversion. It's a GM 605 box and a combo of diff. pitman and idler arms,..... 'sposed to be a "bolt in".

There is an overcenter hard-spot (requires extra effort) when turning the wheel. It's primarily toward one side. I have dropped all the linkage and fiddled with the box adjustment to the point that the "hard-spot" is barely perceptable with no weight on the wheels. However, with weight on the wheels and in a normal driving situation, the hard-spot is still there.

I am in a mode of trying to determine whether the problem is in the box, or in the steering linkage. Next, I will attempt to get accurate measurments of the linkage to understand if it might be a geometry problem. I'm pretty sure I understand the geometry requirements.

I am bummed after putting considerable time and $ into this project. 'Sposed to be my everyday driver.

I would welcome any insights or advice anyone would like to share.

I have a 57 RW ,and installed a GEARHEADS p/s box in it.Was undrivable on the road over 40mph.Went to a rack,problem solved.Look up 57ford/gm605/wanders bad in this .I hope you take the sector out and look at the gear,i feel I know what you will find.You can try to get your money back ,but, I feel they are a ripoff, good luck