I feel the measurements are within +/- 1°. Results are averaged from 4 measurements using a degree wheel, piston stop and final word indicator. Measurements were repeatable within 1 degree.

Front/Left Cylinder:
Intake opens at 46 btdc, closes at 55 abdc
Exhaust opens at 78 bbdc, closes at 25 atdc

Rear/Right Cylinder
Intake opens at 48 btdc, closes at 55 abdc
Exhaust opens at 75 bbdc, closes at 28 atdc

Clarence Lee measurements:
Front and Rear Cylinders:
Intake opens at 40 btdc, closes at 60 abdc
Exhaust opens at 75 bbdc, closes at 25 atdc

She's ready to run when I receive the inserts from Chris.

Many thanks to all that helped!