394 or 371?
April 19th, 2019, 11:28 PM
#1
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Join Date: May 2010
Location: Australia
Posts: 499
394 or 371?
Hi there,
My engine ready to go in shortly.
I am sure it is a 394 as that is what I ordered however I have been questioned over this I know my builder knows his stuff. I have someone telling me it is a 371 as they
think they are 371 heads also a 394 apparently has 3 bolts on the center exhaust ports (2 top and one bottom) instead of 2, 1 top and 1 bottom.
Definitely a 394 as I can see it as there is ‘4-1/8’ is cast indicating bore size.
Also '59-'60 394 heads had two bolt holes on the center exhaust port, while the '61-'64 heads had three and took different manifolds, is this correct?
Could people in the know please clarify this is there a similarity between the 2 engines in this respect and has someone here got their wires crossed.
Thank you
John.
Last edited by 5998DownUnder; April 20th, 2019 at 02:09 AM.
April 20th, 2019, 08:47 AM
#2
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Join Date: Sep 2017
Location: St. Paul Minnesota
Posts: 4,010
John, to clear things a little, 1957-58 had a "371" that was a different block and heads. 1959-60 had a 371/394.
You are correct about 394 because the 4 1/8 is cast on the rear of the block. Charlie Jones can tell you what heads they are. I think they are 59-60 heads (371/394) because:
1. they are #18 heads, (1957 heads were #14 and 1958 were #16 heads)
2. they have bolts in the flange of the valve cover (1957-58 had two bolts in the middle of the valve cover) .
You are correct about 394 because the 4 1/8 is cast on the rear of the block. Charlie Jones can tell you what heads they are. I think they are 59-60 heads (371/394) because:
1. they are #18 heads, (1957 heads were #14 and 1958 were #16 heads)
2. they have bolts in the flange of the valve cover (1957-58 had two bolts in the middle of the valve cover) .
April 20th, 2019, 08:52 AM
#3
Phantom Phixer
Join Date: Dec 2011
Location: Apopka, FL
Posts: 4,666
I have someone telling me it is a 371 as they
think they are 371 heads also a 394 apparently has 3 bolts on the center exhaust ports (2 top and one bottom) instead of 2, 1 top and 1 bottom.
Definitely a 394 as I can see it as there is ‘4-1/8’ is cast indicating bore size.
Also '59-'60 394 heads had two bolt holes on the center exhaust port, while the '61-'64 heads had three and took different manifolds, is this correct?
.
think they are 371 heads also a 394 apparently has 3 bolts on the center exhaust ports (2 top and one bottom) instead of 2, 1 top and 1 bottom.
Definitely a 394 as I can see it as there is ‘4-1/8’ is cast indicating bore size.
Also '59-'60 394 heads had two bolt holes on the center exhaust port, while the '61-'64 heads had three and took different manifolds, is this correct?
.
That " someone " was wrong .
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