From 63-76 the width from center to center of the spring perches remained unchanged. I just swapped an 8.750 from my 73 Scamp to my 63 Dart. With the exception of the driveshaft shortening, it was a bolt in swap. I am sure the 8.250 is similar.
Thank you SS, I am going to go with the 8 1/4 :happy10: I need all the HP I can get with my little 170, I would stay with the 7 1/4 because it is so light and don't use up HP. Good to here this my friend :happy10::happy10: Thank you