haven't seen an original that looks exactly like the bracket #3724091 in the FAM, all [both] have been as Mike sez, 'feet' facing outward - but then, the ones I've seen were 57/8 .... keep in mind that the FAM was for 55 only, doesn't show any subsequent changes that may have been made - the date on that sheet is July 1955, about when actual 2nd series trucks appeared .... the repro ones I've installed fit the firewall holes, but that was later models that might have seen running changes, and the repros may heve been copied from a later item, the firwall stampings changed slightly in 58
I'd say if you're fixated on finding an original, rather than fabbing your own, it'd have to be from a 55 only, don't count on any later years being the same
Bill
