according to their website they clear the power steering and they are available coated as well.....I think 78076 would be the part number but I would check with a parts place to be sure.
CHALLENGER TRANSMISSION
Years Engine Painted Hedder Part# HTC Hedder Part# Elite Part# Repl. Gasket A/C P/S Auto Col Auto Flr Std Col Std Flr Tube & Collector
70-74 273-360 78050 78056 -- 27970 1, 6, 13, 129 Y Y Y Y Y Y (C) 15/8", 3"
70-74 273-360(Tight Tube) 78500 78506 -- 27970 1, 13, 15, 151 Y Y Y Y Y Y (C) 15/8", 21/2"
70-72 361-440 75060 75066 -- 27900 1, 8, Multi-Piece, Slip Fit Y Y N Y N Y (C) 2", 3"
70-74 361-440 78030 78036 78038 27900 1, 129 Y Y Y Y Y Y (C) 13/4", 3"
70-74 361-440 78070 78076 -- 27900 1, 15, 151 Y Y Y Y Y Y (C) 13/4", 21/2"
70-74 5.7L Hemi (Swap) 78604 76604 -- 27490 Hydraulic Clutch, Stepped Y Y N Y N Y (X) 11/2-15/8", 3