In 70 & 71, I believe you could only get the power bulge hood as part of the Cuda package. In 73 & 74, you could get it on any thing, even a slant six if you like. There was never a 3.83 rear end factory supplied in any Chrysler that I know of. Common ratios in 60s & 70s Chrysler products are 2.71, 2.73, 2.74, 2.91, 2.93, 3.23, 3.55, 3.91, & 4.10. The reason for some of the numbers being so close together is that some of the smaller units, IE 7.25 ring gear, have space constraints on number of teeth you can put in it. As previously noted by our knowledgeable friend, you likely have a 3.91 if you have correctly counted. This could have been ordered special from the factory, but would not have been standard. Most V8s w/ performance options had 3.23, w/ other options available. Most 2 barrel V8s came w/ 2.71 or 2.93. Ovmf
