The man near Dallas is Bob Craig who is Garland, TX. You can get his phone # through a Google search or PM me. Years ago I attended a workshop he did on F100 conversions. Pricing starts around $500 and go down from there depending on the parts you supply. The donor box sector housing end is machined on a mill to match the shape of a model a sector housing including correct taper for frame rail. The sector shaft is machined square to accept the Model A pitman arm. A sleeve is machined to adapt the Model A column to the lesser diameter F100 steering shaft column mount. The Model A steering shaft is machined, sleeved and welded to the lower shaft from the F100 box. All aligned in a lathe. An adapter is made to hold the light switch housing. New sector roller, worm, bearings and seals are added as needed and adjusted. All machine work is high quality.