[Bill Cuthbertso]

I do realize this is a really crappie pict but it's the best I can do.
This is a picture of one guide disassembled and one assembled as it would go into the carb. It can be locked into any position you desire, I set my third hole at 12 o'clock. If you make the jig, I would suggest using a one millemeter new HSS bit of good quality as this will reduce the tendency to wander off center. The threads are 7mm x 1.0.
These modifications were done for a 2332 cc opposed four cylinder engine.
Hole is 2/32 ( 1/16 for the mathamatically challanged).
off center, overall all length is 15/16.