Put new drives and tie bar system on. Drive Center line is 36" at the gimbals. Do you align the drives at the tie bar the same center? I was told to toe them in 1/8 to 35 7/8". Is this correct? Drives are IMCO SCX's.

I would try them in/out/neutral and 1/8" is enough. Which gives you the most MPH is the one I would pick. I doubt you will feel any difference in the handling. Why you are at it, you might want to try turning the props in and out at each setting.