I need a replacement K member for my 1971 Challenger. I picked up a decent one for $40.00 The guy said he got it from a local wrecker years ago, they told him it was from a 1974 Barracuda. It has 049M142 clearly stamped on the top side with a 7 also stamped on the top side, on the bottom it has what looks like 646141 ? It is a V8 k member with the 70 & up sway bar mounting holes. The only E-body that I can remember this wrecker having in the last 20 years is a 1971 challenger that had a 1970 grill. I checked the tech archives, no matches. Can anyone ID this k member ? THANKS