SBC 400 block build date
#1
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SBC 400 block build date
Got a SBC 400 "509" and been trying to ID it. As far as I can tell its possibly made in Saginaw due to a casting clock on it. My friend said its an early 70's cheater block probably from a truck, and probably high nickel content. I found the following mark "H/17" which I think is the manufacture date. If it is, then the block would be from 1 Aug 1977. 2 bolt.
Two questions: how does one figure out if it is a high nickel content block and can anyone verify or ID the "H/17" mark?
tks in advance
Two questions: how does one figure out if it is a high nickel content block and can anyone verify or ID the "H/17" mark?
tks in advance
#2
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if i recall right.......the truck block(high nickle block) had a raised half moon shaped stamp right on the back of the block on the opposite side from the block number is located :wink:
#4
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I don't know that there was ever a high nickel 400 block ever made and i've ran several of them, including the one in my car and one on the engine stand in my shop. 350's yes, 400's i doubt.
JMO
Zip.
JMO
Zip.
#5
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Originally Posted by zipper06
I don't know that there was ever a high nickel 400 block ever made and i've ran several of them, including the one in my car and one on the engine stand in my shop. 350's yes, 400's i doubt.
JMO
Zip.
JMO
Zip.
3951509
3030817++
1974 - 1976 400ci 2 Bolt Mains
++High Nickel Block
#7
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I found another source identifying alloy % content mark: "010 and 020." The first being tin and the second nickel. I got the 010 mark but not the 020 so that follows with what you found - oh well. I'm about to take it in and get it magged and all that...will help me decide how to build on it. First engine build, going to be either 406 or 427.
tks for info guys!
James
tks for info guys!
James
#8
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Originally Posted by RROP89
I found another source identifying alloy % content mark: "010 and 020." The first being tin and the second nickel. I got the 010 mark but not the 020 so that follows with what you found - oh well. I'm about to take it in and get it magged and all that...will help me decide how to build on it. First engine build, going to be either 406 or 427.
tks for info guys!
James
tks for info guys!
James
#9
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Originally Posted by hink
Originally Posted by RROP89
I found another source identifying alloy % content mark: "010 and 020." The first being tin and the second nickel. I got the 010 mark but not the 020 so that follows with what you found - oh well. I'm about to take it in and get it magged and all that...will help me decide how to build on it. First engine build, going to be either 406 or 427.
tks for info guys!
James
tks for info guys!
James
#10
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Originally Posted by zipper06
Thanks fast75vega, for passing along those #'s. A person never gets too old too learn something new and i just did ops:
Zip.
Zip.