NEW DISTRIBUTOR ???

D&C1988 wrote: Just wanted to be sure that spinning it the opposite direction wouldn't cause a problem .

You won't be spinning it in the opposite direction. Looking down on the distributor it will still spin counterclockwise. The camshaft and crankshaft go opposite of an auto engine, that is why you need the RR gear. It turns the dist. in the PROPER direction. Just verify that looking at the FRONT of the engine that it spins CCW.
Then all you need is a RR gear with the corresponding I.D.
I have a new spare gear that is a .550 id. that is bushed to .464 id. It can be bushed to any size.

You will certainly need a RR gear. Determine the shaft size and obtain proper gear. We went thru this in detail a few months back. Gears can be bushed or bored to fit the shaft. Mic the shaft. I have one new spare gear RR. Usually have to re-drill the cross hole as there seems to be no set dimension used.