Maniacmechanic1
solid fixture here in the forum
Looking for A large Machine Shop 45 degree Tapered Countersink Grumpy.
To convert 1955-1971 Gasket Seat Spark Plugs to the later 1972-81 Tapered Seat Spark Plugs.
Read it was easy to do in ancient Pontiac Magazine back around 1990.
Found nothing here or Google.
Can it be done by hand or use a Bridgeport Veticle Mill with its adjustable Quill stops ?
Have a few sets of Vintage A.C. Delco Ultra cold Racing spark plugs.
Non resistor .460 " reach.
41 & 42.
42 used in RAIV High speed Race.
ACCEL made ultra cold for nitrous Pontiac in past.
Gone now.
Tapered Seat opens more options.
To convert 1955-1971 Gasket Seat Spark Plugs to the later 1972-81 Tapered Seat Spark Plugs.
Read it was easy to do in ancient Pontiac Magazine back around 1990.
Found nothing here or Google.
Can it be done by hand or use a Bridgeport Veticle Mill with its adjustable Quill stops ?
Have a few sets of Vintage A.C. Delco Ultra cold Racing spark plugs.
Non resistor .460 " reach.
41 & 42.
42 used in RAIV High speed Race.
ACCEL made ultra cold for nitrous Pontiac in past.
Gone now.
Tapered Seat opens more options.