The point gap would probably be about .016-.018". The actual specification is 30 degrees dwell, which must be checked with a dwell meter. Spark plug gap is .030"
.030"
A lot!
Do you mean 345 ?
30 degrees
#1
My 66 has a naturally aspirated 345 International v8
Point gaps for virtually all engines of the era was 0.014 to 0.016 inch
Chiltons manual
From front to rear, drivers side1,3,5,7 passenger side 2,4,6,8
If you lean over a fender and look at the front of the valve covers on both sides of The engine. You will notice that 1 valve cover is futher forward then the other. That will be #1 cylinder on that head. The first spark plug up front. Be advised that the 345 International V8 is timed by #8 cylinder NOT #1 cylinder. The #8 cylinder is the rear most cylinder on the passenger side.
My 345 User manual says replacement plug is (M71939) from your John Deere dealer. Clint
Stopwatch