Head casting #'s
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
are you sure the first # is not a 3??
..68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
used in trucks, no accessory holes
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742.
..68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
used in trucks, no accessory holes
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742.
Thread Starter
Safety Car
Joined: Sep 2009
Posts: 4,142
Likes: 24
From: Simcoe Ontario
are you sure the first # is not a 3??
..68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
used in trucks, no accessory holes
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742.
..68......327.........."Right angle" casting identifier, 64cc chambers, good HP head,
used in trucks, no accessory holes
3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head
3947041X...69-70...302/350......"Right angle" casting identifier, 64cc chamber, 165cc intake port, accessory holes, good HP head
3951598....70......400..........76cc chambers
3964286............350
3965742.
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
Instructor
Joined: Oct 2005
Posts: 157
Likes: 3
From: Silver Spring maryland
casting numbers
a good reference book I have is 1955-82 Corvette by the numbers by Alan L. Colvin
it shows Head#3947041 on page 153 apply to 1969 350 cu. 300 HP, unverified on the 350 HP, and 1970 350 cu 350 & 370 HP.
In the notes section it states the head is identical with #3782461 (a 327 head used in 1965 and 1966) except for a redisgned combustion chamber, the addition of a temperature sending unit boss and 3 accessory bolt holes added to the end of each head. This head was interchanged on some models with #3927186 and 3927187.
hope this helps
it shows Head#3947041 on page 153 apply to 1969 350 cu. 300 HP, unverified on the 350 HP, and 1970 350 cu 350 & 370 HP.
In the notes section it states the head is identical with #3782461 (a 327 head used in 1965 and 1966) except for a redisgned combustion chamber, the addition of a temperature sending unit boss and 3 accessory bolt holes added to the end of each head. This head was interchanged on some models with #3927186 and 3927187.
hope this helps
Team Owner
Joined: Oct 2000
Posts: 38,897
Likes: 1,926
From: Washington Michigan
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Drifting
Joined: Apr 2008
Posts: 1,722
Likes: 0
From: chazy ny
a good reference book I have is 1955-82 Corvette by the numbers by Alan L. Colvin
it shows Head#3947041 on page 153 apply to 1969 350 cu. 300 HP, unverified on the 350 HP, and 1970 350 cu 350 & 370 HP.
In the notes section it states the head is identical with #3782461 (a 327 head used in 1965 and 1966) except for a redisgned combustion chamber, the addition of a temperature sending unit boss and 3 accessory bolt holes added to the end of each head. This head was interchanged on some models with #3927186 and 3927187.
hope this helps
it shows Head#3947041 on page 153 apply to 1969 350 cu. 300 HP, unverified on the 350 HP, and 1970 350 cu 350 & 370 HP.
In the notes section it states the head is identical with #3782461 (a 327 head used in 1965 and 1966) except for a redisgned combustion chamber, the addition of a temperature sending unit boss and 3 accessory bolt holes added to the end of each head. This head was interchanged on some models with #3927186 and 3927187.
hope this helps
Thread Starter
Safety Car
Joined: Sep 2009
Posts: 4,142
Likes: 24
From: Simcoe Ontario
a good reference book I have is 1955-82 Corvette by the numbers by Alan L. Colvin
it shows Head#3947041 on page 153 apply to 1969 350 cu. 300 HP, unverified on the 350 HP, and 1970 350 cu 350 & 370 HP.
In the notes section it states the head is identical with #3782461 (a 327 head used in 1965 and 1966) except for a redisgned combustion chamber, the addition of a temperature sending unit boss and 3 accessory bolt holes added to the end of each head. This head was interchanged on some models with #3927186 and 3927187.
hope this helps
it shows Head#3947041 on page 153 apply to 1969 350 cu. 300 HP, unverified on the 350 HP, and 1970 350 cu 350 & 370 HP.
In the notes section it states the head is identical with #3782461 (a 327 head used in 1965 and 1966) except for a redisgned combustion chamber, the addition of a temperature sending unit boss and 3 accessory bolt holes added to the end of each head. This head was interchanged on some models with #3927186 and 3927187.
hope this helps
