Here's a page from the
1959 Master Parts catalog.
@
photobucket
These are the Part Numbers you will need.
You will need ( 3 ) of each part # .
http://i669.photobucket.com/albums/...rm_part_numbers________2_zpsaqtekf1q.jpg1.)
3764489 - LEFT - Intake Rocker Armhttp://i669.photobucket.com/albums/..._Left_Intake_Rocker_Arm__zpsj6hbkxni.jpg2.)
3764490 - Right - Intake Rocker Armhttp://i669.photobucket.com/albums/...1959_to_1962_Chev_6_Cyl__zpshoplffbs.jpg3.)
3764481 - LEFT - Exhaust Rocker Armhttp://i669.photobucket.com/albums/...ROCKER_ARM_1959_to_1962__zpsktmdbfng.jpg4.)
3764482 - RIGHT - Exhaust Rocker Armhttp://i669.photobucket.com/albums/...HAUST_RIGHT_1959_to_1962_zpscwkhnzws.jpgThere are many on ebay right now .
Go to ebay & in the search box......type the part # .
Availability other then ebay .
Chicago Auto Parts
Saint Ann , Ill.
phone: 815-614-3122
Chicago has ( 1 ) GM # 3764490 - GM NOS in stock
Collector Auto
Blaine, WA.
phone: 800-414-4462
Collector has ( 1 ) GM # 3764490 - GM NOS in stock
Llewllyn Obsolete GM
Northridge , CA.
phone: 818-363-5094
Llewllyn has ( 1 ) GM # 3764490 - GM NOS in stock
Dan's GM Obsolete
Chinook , Montana
phone: 406-357-2615
Dans has ( 8 ) GM # 3764489 - GM NOS in stock
Dan's has ( 8 ) GM # 3764481 - GM NOS in stock
Dan's has ( 14 ) GM # 3764482 - GM NOS in stock
Also check with Jody Anderson in Minnesota
He may have all four rocker arms.
Phone: 612-727-2404
Make sure you ask whatever seller you buy from about
any severe rust & check to make sure each rocker comes
with the adjuster screw & adjuster nut .
Hope this info helps you out,
George
'54 3600