distributor help

The duster (73) 340 we got has a 7al msd picked up a new coil blaster 3 the old coil was for racing only now to replace part's in dis. it's an older Chrysler 3690200 I'd like to clean it up with new part's, can any please tell where I can get the part's for this older dis'. better still tell me what I would need .This car was built for speed back then this time capsule
sat since 78 till four year's ago after a week of cleaning carb learning to get it sparking it started and ran great, since then I've learned about reverse valve tran's changed the rear end from 488 to 323 for road ,what a was line lock plus more the body was easy just some cosmetic it's now painted ready for spring I'm not a performance guy I just want a car to go to cruise night's and enjoy please be gentle I can do the body stuff but I'm no engine guy I just want to get up start it and drive hot race thank's for any help