Stroking 318

That is very broad. In a stroker? Of what size? or the 318?

What gear ratio do you have again. And what converter do you have, stock or modified with what stalll rating?

lopey sounds come from a lower C-line. Most cams come with a 110. The larger the engine, the lower it should be for performance. A 110 is a good sounding cam in a 318 mild in a 360, mello on a 390+ engine. Also, ramp rates have an effect. Theres more to it than that, but that will do for now and it's all you'll need for a lopey sound.