My first car was a 73 Challenger myself. Car came with 360 in it and I pulled it with in the first 6 months and went with a 440 six over the 340 six. Got the R/T hood and traction bars. Cant remember the tranny so much, something like 700 interceptor or something along those lines. They used them in some Dodge cop cars in the 70's. Yanked the auto shifter for the Hurst. Was a very nice car for a 16 year old that Iwas at the time ( 86 ), but like any car with that much power and that age. Insurance was killing me and cops loved to follow me as well.