During the 70's I ran a 426 street wedge and 2 6 pack cars. SS springs and SW shocks. Cars hooked on the street and at the track. Now I have a lighter car with a 273 and in no way am I making the same HP and TQ. Two left handed SS springs are more than enough for this combo. I had read that gas filled shocks do not perform as standard shocks and one of the members replied in same. I don't need a big dollar rear shock. I'm just looking for something that I know work with my B body cars and do the same with my Dart. Every shock that I found has been a gas shock. So I'm trying to find that standard rear shock, and as Cab Burge mention, '71 Imperial or something comparable.