I converted my '70 Cuda to manual 20 years ago, but I used a manual box from a parts car slant 6 '70 Barracuda, I just ordered a pitman arm from Summit, for a Barracuda, and was not asked if it was power or manual steering, plan to change it and the idler arm this weekend.
The company was Proforged Chassis, part # 103-10030.

1970 'Cuda,Lime Light,499 Indy S/R's 10.70's @125,street driven ALOT!
1966 Barracuda 360,now a 5spd,Hemi Orange,Hot Rod Air,
New daily driver-2003 Ram 2500 Cummins 5.9
'69 Valiant 2-dr, sleeper!
New project---1938 Dodge truck, plan is a 360 with a A500, AC, Calvert rear susp., rack and pinion front with coils.