318 low budget heads change

That's the 'draw back' with the 360 Cylinder Heads mounted on the 318.

'Low-End' Torque.

You need more Cam with the 360 Cylinder Heads, or the gain is about 'equal'
on the Steet.

#302 Heads.....................{Better Bottom-End and Low-End Torque}
#360 Cylinder Heads........{Better Mid-Range and Higher RPM's at Top-End}

If you're not changing the Camshaft........... ???