67 firebird rear question

[marxjunk]

The nodular rear was a heavy duty option,but came on a lot of 4 speed cars....really tuff to get,,really expensive if you need one. Ive had 3.55 posi rears, and they werent nodular,they are the top performance rear..and they made Ram Air I birds in 67,,and it would be this type of rear in it, but 4.33s where standard. Has a better 4 pin posi that is heavy duty too...