682 Engine Swap Spacer Question

[Texas Blues]

Hey guys, I am in the middle of, or I should say closer to the end of this 682 engine swap. Went from the KT 17 to the CH20 (thanks to Olds, who did an outstanding job at crating and sending this motor). My question is about the spacers between the engine and the engine plate. When I use the spacers from the KT, I don't like the drive shaft angle. Without the spacers it pretty close to a level drive shaft, but even without the spacers, its a hair high. Question is, are the spacers there for driveshaft alignment, or does the motor have to sit on them for some reason? I am using a engine plate from an 1864 because it had holes drilled that put the motor far enough forward so the pto lined up better with the mule drive. The height seems the same even with the original plate. I currently have it mounted with no spacers and it seems to be fine like that, it seemed that the feet of the motor sat flush without the rest of the motor bottom touching the plate. Other than a challenging oil change, will it hurt the motor to sit flush on the plate? On the drive shaft mod, im currently working a 2000 series shaft mod that should be more forgiving on the driveshaft angle. Thanks for any advice. TB