I just went out and looked under the hood of my 59. The open section of the "C" is to the back, facing the firewall. Thus the flat section faces foreward.
428 powered Fairmont drag car, Best ET:10.03@132.11MPH, best 60 ft: 1.29
59 Meteor 2 dr. sedan 332, Ford O Matic
74 F350 ramp truck 390 4speed