Cams How do you choose one?

Tough call
light car, 4 speed and reasonable gears
however low compression and stock hp manifolds so we will need early intake close to build some cylinder pressure and a slightly longer exhaust
your best shot
go to the Stan Weiss site and find some comparable head flow numbers
fill this out
Street Performance | Jones Cams
if his one and only Mopar Hyd is not a fit go solid Flat Tappet with EDM lifters rockers like the 273 used
Comp really has nothing that even comes close
maybe Lunati Voodoo or howard with the "footnote 15" in the catalog Bullet is also a good choice
problem is getting anyone that knows Mopars at the bigger cam grinders Engle knows mopars
problem is finding someone that knows low compression mopars
Bottom line is that too much duration and you have a real dog Jones can answer the question how much is too much
there are several other threads on low compression motors- most are automatics one thread has tall gears and an OD- another tough combination
IMHO you are looking for short seat duration but big duration at 200 and higher