mainshaft spacer for 1942 45"

[DCoul]

I can get the endplay of my mainshaft to .002 or .007 because the spacers come in .005 increments. Am I better leaning toward a little loser, or tighter?

[RCamp]

Tighter, the end play will increase as the aluminum case heats up.

[DCoul]

Great. Thank you RCamp. I appreciate the "why" also. I like to know how things work.