Chris Craft did some unorthodox things with regard to engine rotation and engine/hull orientation.
If memory serves me, even some of the single engine applications are unique to Chris Craft.
To answer or help you with the starter motor question, you'll first need to tell us which way the actual engine flywheel rotates,
and as though viewing from behind (or rear of) the engine.
Now we're talking in terms of "Industry Standards" here.... not Chris Craft's version, just to be clear.
IOW, you will be standing at the engine, and viewing the flywheel end.....,
not the harmonic balancer or engine circulating pump end..... the flywheel end only.
You may also look at the teeth on the flywheel ring gear.
The side that is shiny, will be the side that has been driven against. This will indicate rotation also.
Just to give you a heads-up:
Marine/Automotive Industry Standards dictate that a flywheel that rotates CCW, indicates a LH or Standard Rotation Engine.
The same standards dictate that a flywheel that rotates CW, indicates a RH or Reverse Rotation Engine.... regardless of Chris Craft or any other boat manufacturer.
What Chris Craft did after that, was up to them. 350 Q or 350 QL..... does not matter.
Industry Standard is Industry Standard!
On another note..... all SBC ignition distributors rotate CW as per the engine oil pump. To my knowledge, there is no reverse oil pump.
Only the driven gear on the distributor shaft changes (and the camshaft drive gear) as to correct the distributor rotation for a RH engine..... (minus some internal changes to the thrust surface within the distributor itself.)
Here is a fairly recent thread on Chris Craft Engine Rotation topic, but involves twin engines. A 350 QL and a 350 Q.
The OP became upset that things were not going how he had hoped for. But the info is there.
http://www.marineengine.com/boat-fo...2-Engine-rotation-for-CC-1982-350-QL-amp-350Q
Again, your best method at this point, is to turn the engine in a direction that causes a CW rotation of the distributor, or look for the wear pattern on the flywheel ring gear teeth.
Either or both of these should tell you which hand it is.