Welcome to the club! What do you plan to do with the motor after your build is done? You'll need to find out if the crankshaft has the serrations at the rear seal. These are used to keep the oil in the crankcase. If you change the rotation back to standard and the serrations are there, it'll actually pull the oil past the seal.

Not a huge hurdle 'cause you can swap out the crank pretty easily. There are some great guys here who "speak Bow Tie" fluently! But I'm not one of them! LOL...

It's good to see you here and keep us updated as you go along!