Can Am BBC

[Carleen]

I can update that list.

Can-Am blocks 68/69 - Winters
# 0-294550 = 4.250" bore with steel liners (427 ci)
# 0-321270 = 4.440" bore with steel liners no fuel pump boss (430, 465 ci)
# O-326711 = 4.440" bore with steel liners (430, 465 ci)
# 3946052 = 4.440" bore with steel liners (430, 465 ci)
# 3946053 = 4.440" bore with steel liners (430, 465 ci)

Can-Am blocks 70/71 - Reynolds?
# O-399204 = 4.5" bore and steel liners (509 ci)
# O-495102 = 4.5" bore and no liners

ZL-1 Factory blocks - 1969 - Winters
# 3946052 (No 'O') 427 ci.
# 3946053 427 ci

ZL-1 Factory blocks - 1997 & up
# 3946053 (No 'O') 427 ci.

# 3992038 (O?) * may be 4.44" bore w/ Liners - era?.

# 3946052 Yenko Casting LC 427
# 3946053 Yenko - Casting has YENKO
# 3946053 Yenko - Casting has Y E N K O
# 394605Y Yenko - Casting has Yenko Crest Logo

[Carleen]

Can-Am blocks 68/69 - Winters
# 0-294550 = 4.250" bore with steel liners (427 ci)
# 0-321270 = 4.440" bore with steel liners no fuel pump boss (430, 465 ci)
# 0-326711 = 4.440" bore with steel liners (430, 465 ci)
# 3946052 = 4.440" bore with steel liners (430, 465 ci)
# 3946053 = 4.440" bore with steel liners (430, 465 ci)

Can-Am Block 70 Winters
# 3946052 = 4.440" bore with steel liners (494 ci)
# 3946053 = 4.440" bore with steel liners (494 ci)

Can-Am blocks 70/71 - Reynolds
# O-399204 = 4.5" bore and steel liners (509 ci)
# O-495102 = 4.5" bore and no liners

ZL-1 Factory blocks - 1969 - Winters
# 3946052 427 ci.
# 3946053 427 ci

ZL-1 Factory blocks - 1997 & up
# 3946053 427 ci.

# 3992038 may be 4.44" bore w/ Liners - era?.

# 3946052 Yenko Casting LC 427
# 3946053 Yenko - Casting has YENKO
# 3946053 Yenko - Casting has Y E N K O
# 394605Y Yenko - Casting has Yenko Crest Logo

[StealthBird]

I have internal engineering documents dated Feb 29, 1968 showing the following aluminum 427's equipped with sleeves:

19950-17-A (first development engine, installed in Corvette 78027 for F.I. development)
19950-17-J (Laguna Seca race and Riverside Practice, #3, #4, #6 resleeved and machined)
19950-17-K (ran LeMans for 14 hrs, approx 1000 miles, showed gasket burning on #1 cyl)

Not sure how these numbers correspond to the ones listed above, but I believe these were development blocks.

Mike