Thanks for the input Bruce. My cylinder drain is working fine. Something is wrong with the left mag timing, which might explain the kickback. There isn't any sound of the impulse coupling either so I think it is a problem with the mag or drive gear. I will pull off the mag tomorrow and hopefully see what is up.

Once I get the engine running I will do the fuel injection SB. I am very familiar with it, as it is part of the teaching I do with TSIO-520 engines with with the students I train. I just haven't done it on an IO-240.