I have some measurements to pass along.
As noted bore spacing is staggered and is:
#1 to #2 = 4.188”
#2 to #3 = 4.375”
#3 to #4 = 4.188”
#4 to #5 = 4.375”
#5 to #6 = 4.188”
Here are the head bolt coordinates numbered according to torque sequence:
1 = X0 Y0
2 = X0 Y-2.050
3 = X2.530 Y-6.088
4 = X-2.530Y-6.088
5 = X-4.279 Y-.286
6 = X4.279 Y-.286
7 = X6.035 Y-6.088
8 = X-6.035 Y-6.088
9 = X-8.557Y0
10 = X-8.565Y-2.050
11 = X8.557Y0
12 = X8.565Y-2.050
13 = X9.670Y-6.088
14 = X-9.670Y-6.088
15 = X-12.561Y-.218
16 = X-12.985Y-5.898
17 = 12.561Y-.218
18 = X12.985Y-5.898
Tolerance on measurements is .005” or less.
