Information on a 340 for my 69 dart

ha yup that just a number ,money not really the problem if a spread it out over a couple of years
i just not sure what i should be looking for (what came in the 69 ) when i get done want it run like it came from the factory no more no less
i'm the kind of guy that will need to use the oe spring clamps on the hoses
so if something comes up local that fits the car i can run out and buy it
see stuff like 6 pack heads x blocks purple cams ect. not sure what i should be looking for (do i need a forged crank ?? most likely not but if oe in 69 i would want one)
its a manual car man steering (bought a ps box)
if a find a v-8 doner car what is different ,stuff like that are all sb k frame the same post 67
i have a set of small bolt front disks ,spindles calipers ,was that even an option?
then do in need to go big lug pattern to use a 8.75 rear ,would run 355/373 think 411 to low
just don't want sorce the wrong stuff