Stop in for a cup of coffee

I bought the car disassembled. It had the front disc conversion but was disassembled. The guy had /6 bars and was running them with a 360. I bought these 340 bars and a new 340 k frame, has the washer welded to the front of the frame. This car has been immobile since I bought it, sad but true.
this might be a dumb question and maybe its been addressed already, but have you measured or confirmed the part numbers to make sure it's for an A body? I screwed up years ago with the charger, i bought a set of big block T bars from a guy on moparts advertising them as B body bars from a 71 charger. Since a 71 has the same body style as my 74, I assumed the bars would interchange. Wrong, the 73-74 bars are 2.5 inches LONGER than 71-72 T-bars.