You will need to use your bellhousing, 6V starter and 6V flywheel. You'll need to put a pilot bushing in the crank of the '58 engine.
If your truck has a 235 in it now it must have an altered water pump. You'll need to use it too. The stock '58 will be too long.
I'm not familiar with car front mounts but if the holes aren't drilled, you can drill them, then square them with a file.
Use your 6V coil.
