If You're re-creating a factory heater-delete, correct rubber caps & OE clamps as stated above. If You're simply bypassing it permanently for racing etc., I would use the
pipe plug method leadfoot & 12many have described. Many '80's FWD Mopars had "crossover" Radiator application, some had the heater hoses on the rad tanks, some not.
The replacements would come w/the fitting for the hose, and a cap if it was unused, those caps can/will eventually leak/fail.
