Stock bottom end 360 magnum
I started out as you did and found my low mileage 5.9 had a bent rod due to hydro locking. All bearings were good and no abnormal wear on pistons or bores. I'll let the experts chime in but you have a good plan. Rumble has good advice. Inspect some bearings and lifters, etc. I have spent hours researching in this forum and you can get a reground cam from Oregon and reuse your current lifters. Replacement heads, inexpensive intake, carb and electric fuel pump will have you a nice stout mill. Here is a good reference.
Magnumswap.com - Your source for Dodge Magnum and Mopar engine swap tech.