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06-16-2019, 03:01 PM | #1 |
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400 Small Block Head Numbers
I got the small block 400 I am going to redo and have a question about the head casting numbers. The heads are 333882 heads and it says they are from a a 70/80 400 engine with 76 cc chamber. Just near the casting number there is the numbers 827 78 cast into the block as well. Is this when the head was cast like I'm thinking 827 is 27th of August and the 78 is for 1978. I can't seem to find any reference to these numbers seaching the web.
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06-16-2019, 03:31 PM | #2 |
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Re: 400 Small Block Head Numbers
1970-80 333882 350 (or) 400 1.94 int 1.5 exh 76 cc
Does it have a letter number pad like this?
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? Last edited by The Rocknrod; 06-16-2019 at 03:39 PM. |
06-16-2019, 04:40 PM | #3 |
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Re: 400 Small Block Head Numbers
Here is pics of the stamping on mine. Its stamped differently thatn the one you posted.
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
06-16-2019, 08:29 PM | #4 |
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Re: 400 Small Block Head Numbers
78 is likely the year of manufacture. Most SB 400's were make from about 1970-1974? and put in full size cars, with 2 bbl carbs only. I have seen 400's in 78-80 4X4 pickups (only seen them in 4X4's, don't know why), these all had Quadrajets on them...
882 heads are the worst large vale small block heads, period. You need something else. The World Products SR head is excellent!!! |
06-16-2019, 09:06 PM | #5 | |
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Re: 400 Small Block Head Numbers
Quote:
https://www.summitracing.com/int/parts/sum-152123
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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06-16-2019, 11:53 PM | #6 | |
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Re: 400 Small Block Head Numbers
Even with 72cc chambers you will need to be careful with your piston choice. Otherwise you may have detonation issues. Of course that is dependent on the cam used. And don't forget that the steam holes will have to be drilled.
Quote:
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06-17-2019, 01:20 AM | #7 | |
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Re: 400 Small Block Head Numbers
Quote:
https://www.summitracing.com/int/parts/sca-25700 https://www.summitracing.com/int/parts/slp-h615cp30 https://www.summitracing.com/int/parts/edl-2101 https://www.summitracing.com/int/par...make/chevrolet https://www.summitracing.com/int/parts/lun-10120701
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06-17-2019, 10:56 PM | #8 |
60-66 Nut
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Re: 400 Small Block Head Numbers
A 406 with that cam will produce excellent low to mid range torque. But with the cams short duration and with those pistons and heads, I would definitely suggest checking the dynamic compression.
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06-17-2019, 11:40 PM | #9 |
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Re: 400 Small Block Head Numbers
I was told compression should be 9.1 or 9.2 with these parts..
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1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021 |
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