1967 Dart differential question

Thank you Fishy68, thats what i wanna hear.. Lol
All i know is the thing is a TANK! hehe

Now back to my original question,
whats this thing worth? Lol
i know price is all dependant on what ppl wanna pay, but just lookin for a ball park range.
Was thinking $150.. dont wanna be too greedy but sure dont wanna give it away. especially since i about killed myself getting this thing out, haha
Is the large bolt pattern standard with the 8 1/4?
or does that make it a bonus?