« Reply #6 on: April 07, 2015 - 12:53:06 AM »
I had no problem installing 71-74 mirrors on my '70. For what it's worth..
I have to agree, I had 71-74 mirrors on my 70, then both the correct mirrors and they bolted right up (same bolt hole width). Also, I just went out and measured 2 sets of 71-74 and 1 set of 70 and they were all the same. The stem horizontal length (the part that goes against the car) are different lengths with the 71-74 being longer (or wider if you prefer). The mirrors themselves are different shapes with the 70 models more oblong with sharper points, additionally the passenger 70 mirror is a different shape than the drivers side presumably to allow better rearview vision.
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Current Mopar
70 Challenger RT 440-6 EFI, 73 Cuda 416-6 EFI
05 Hemi Durango, 01 Ram 4x4, 14 Ram 2500 4X4, 10 PCP Challenger 6 spd RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR (under const)
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)