I believe the GMC & Chevy engines used the same STEEL

distributor gear . This gear is only used on steel camshafts .

PIC

https://s22.postimg.cc/qwrii0lkx/Distributor_Drive_Gear_GM_NOS_b.jpg


Go to ebay & in the search box........TYPE.......1865180

There's one for sale for $9.95.......GM NOS

or

Dan's GM Obsolete
Chinook , Montana
phone: 406 - 357 - 2615

Dan's has ( 7 ) gears in stock


George
'54 3600

1954 3600
A big help to many on the Bolt
Now cruising in
The Passing Lane