Was the yellow one a 73 Dart Sport with a 318 and a 4-speed? I had a red one like that with the DODGE on the quarter panel and it had a 318, 4-speed in it.
No the yellow 73 was a 340 automatic car. One of the best cars I have ever had. I drove it everywhere in the summer, always super reliable and pretty quick. I ran it a few summers at BIR muscle car drags and it was always a 13.7-13.8.