What year A Body 8 3/4 housing is this.

[340six]

Years ago the wife and I were hitting the yards on the regular. Picked up. 2 extras this one and one other. I gifted someone one of my extras.I know on was removed was a 1970 ish swinger looking car. Was 340 and manual trans as had floor hump. Was a 391 gear car. Don't remember what A Body the other came out of.
Kinda want a date (year) for brake lines. I am going with DR.Diffs spring relocation kit. So perches are being moved. When weather is better will get a light blast/prime/paint and clear new soft and metal hose. Just do want the right hard lines and rubber. I know you guys know years from vent thoughts of year so I can get hardlines
I know that the smart guys know by vent location on axle tube.

 

[luke mckenzie]

70-72

 

[Dana67Dart]

Breather on the hump pre 70
Breather on the tube 70 and later

Also you can go to Rock Auto and look at the part numbers for the same car in 67 69 70 72 etc. then narrow it down to the year it changed.

 

[crackedback]

If you do relocation, you may have to bend the hard lines with your u-bolts closer inboard