340 K Member ??
When this washer is in place the car gets HD. torsion bars. 68 and 69 would have heaviest 894 and 895 bars. WITHOUT THE WASHER 70 would have the heaviest 892 and 893. I have seen two on 68's one was a 68 Dart GTS 340 4spd. The other was on a 68 383 4spd barracuda.