I'm about 9/16 away
...pic...
I believe it's a truck large fan
The first pic was deceiving because the fenders were not attached.

I have not checked the timing lately., but I will. It been running real good lately.

Temp started climbing in drive thru. Otherwise it's been fine

Last time I set timing it was 8 degrees advanced. (pertronix)

Of course once we started moving it went right back down. I just didn't know at what point I should shut it down of if it should maintain it temp event at the drive thru.