First 318 build, cam question

The Edelbrock #2177 is a good choice for your combination.

A Good Low-End Torque 'Bumpstick'.

Lift....................... .420"
Duration................ 270*
Duration @ .050".... 204*
Lobe Separation......110*
Intake Center-Line...106*

Since you have Power Brakes {vacuum}, you don't want to go to radical on the Camshaft.

Since this Camshaft has a 'Torque Peak' @ 4000 RPM, you may even be able to get away
with the Stock Valve Springs, as you said you didn't want to pull the Cylinder Heads yet.

With a 318 with a 9.0-1 Compression Ratio, #904 Automatic and Stock Converter, and 2.76 Gears,
this Camshaft is probably the best 'Budget Choice'.