I recently purchased a 1968 mustang coupe. everything on it is original including the engine. this is my first car (im 19) and my father and i plan to put in a lot of work over the summer to fix this baby up. most if not all work will be done ourselves. as soon as i pick the car up on friday i plan to take it to a shop and have them run a diagnostic on the engine to find out how urgently it needs to be replaced. if i wasn't short on money at this point in time i would skip this trip and replace it right away. however money is a little tight so i dont want to waste the money if it is not immediately needed. if it turns out i dont need to get a new engine in it right away im going to look to replace the transmission. this is where my first question is raised. what kind of transmission would you guys recommend? and how much (estimate) would this cost me? i would prefer a 5 speed manual transmission, but we dont know what will fit on the car. any advice is appreciated.