Hey Scott
Yes you need to remove the large bolt inside the damper to pull the damper/ balancer off , it is a 1 1/4" socket , you could put a couple of long bolts in the rear crank flange & hold it with a crowbar , or better is an impact & use air but I bet you do not have either !
When installing the damper you can use a tool that will press it back on or tap it on with a hammer until the bolt threads reach & tighten the bolt up .
The oil pump drive & dist will fit , use a large std screwdriver & twist the drive up out of the camshaft before removing the cam.
I hope you have matching springs for the new cam ?
Rocker shaft bolts are critical do not over torque ever
http://www.mymopar.com/torquespecs.htm