Advice needed. A journal cap came off!

ha said it is the cap BETWEEN 1 and 3, so it would seem to be a main cap
I guess you could try re using the old cap with new bolts and new bearin and hope for the best, that would be cheap and easy and may work fine, I would clean up the crank with some emerycloth though
here read this it has some good info that may help
http://www.forabodiesonly.com/mopar/showthread.php?t=117016