Come on people the rear end is eating power
1 he got hosed
2 he got hosed not being involved
3 the car needs to be tuned aka timmng carb check for full throttle do a comp test
4 318 heads hurt a cam change the heads blow
5 get the car tuned and go from there
6 get involved yourself
7 the Dana 60 might cost him 1/10th
8 the 3.73s helped you 3/10s
9 the dana is not the issue