M62/71 are quite different.
If you had the M62 hand guard, the M62 would be possible as the front and rear sight position are the same as the M76. Visually it would look the same, Hunter/M62, but structurally no. The 62/71 are stamped and use a trunnion set up.
To make further complications, the M71 has the sight post at the end of the barrel and rear sight on the gas tube. In this respect the M78 stamped receiver would be closer to the M71.