RH/LH rotation marine/auto parts

Safe to assume all small block Ford marine engines are Windsors,Cleveland's another Ford small block family rarely turn up as marine engines,not even sure if any parts are common between them,but figure that Cleveland and Boss 302 are not interchangeable with Windsor engines.
Starter needs to be marine,marine ones are sealed so they don't create an explosion hazard.
Fuel pump does not care what direction the engine is but it must also be marine,they have another set of seals and a sight tube in case the diaphragm ruptures. You don't want raw fuel in the bottom of the boat.
Timing covers are not marine specific other than the ones that have a water pump mount. Keep in mind these engines were used in all kinds of inboards,many used in salt water. Aluminum does not last long in salt,the engine builder might not know where the end product would be used so most were cast iron.
Bi directional pumps for small block Fords will fit their small block timing covers.
Distributors no matter the rotation,all turn the same direction,it is the gear that changes on right or left handed engines,oil pumps are driven off the distributor too,so they always turn the same no matter what the rotation of the engine is.
Crankshafts can be handed,right hand engines have knurling at the seal area this way \\\\ to help the seal keep the oil in. Left hand engines can be like this /////.
Harmonic balancers can be handed too only because of the timing marks put on them. A timing tape can be used to correct them though.
Core plugs,or some times called freeze plugs are brass to prevent rust out.
Alternator needs to be marine for the same reasons as the starter and distributor and sometimes the cooling fan on it is rotation specific also.
If you have a PCM engine for some reason the alternator mount is either right or left handed. Never had both in hand at the same time so I don't really know what the difference is.
Early Ford marine engines actually originate from their Industrial division, GT40's engine paper work says Ford Marine Power Products on it,don't know if that was still under the Industrial division though.
I think that's about it,someone will pipe up if I missed anything.
Any other questions just ask.