Ok, I looked at my broadcast sheets today and here's what I found. All 5 cars (1969-1970 B bodies)with A/C call for the 257 Radiator hose on the broadcast sheet-even my original car-which had in fact a 2806186 on it! So it clearly did not conform to the broadcast sheet. The 186 hose was listed for 67,68 B with air and 67-71 HEMI. It was obviously used on HEMI's to clear the fuel lines but it appears they continued to use this shape and later changed (mid 68) to part #2863230 (listed as used from 68-73). This hose also shows up on original HEMI cars as I showed in photos though it was never listed in the books as that application! Dave-I would be glad to fax you these sheets if you would like.