This thread got me to wondering where I put the thumb drive with that data...upon finding it I may as well share it with all.
CYLINDER BORES
DATUM ZERO CYLINDER #1
FRONT OF BLOCK AT LEFT
#1 = X0Y0
#2 = X4.188
#3 = X8.563
#4 = X12.751
#5 = X17.126
#6 = X21.314
HEADBOLT HOLES
X-2.3095Y-2.5709
X-1.904Y3.1087
X1.0Y-2.7542
X2.095Y1.271
X2.095Y3.321
X4.627Y-2.764
X6.3793Y3.0543
X8.127Y-2.7607
X10.657Y1.271
X10.657Y3.321
X13.187Y-2.7607
X14.9347Y3.0543
X16.687Y-2.764
X19.219Y3.321
X19.219Y1.271
X20.314Y-2.7542
X23.218Y3.1087
X23.6235Y-2.5709