Help needed/Racing Mirror

[FinnCuda70]

Hi, got just passenger side mirror that I purchased from E-bay. Part # 3548730, I was told it's from early '70 Cuda but I think it's not   .

Help needed for identification!

[Chryco Psycho]

for 70 I have pt # 3508990 painted
                   & pt #3508989 chrome
for 71 I have  pt# 3586644 chrome
                  & pt# 3586650  painted
 the casting # may be different than the part # though