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#1
09-13-2025, 01:02 PM
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Holley Street Dominator versions
I have a Holley SD going on one of my engines because my 71 HO intake barely made it out of Dave's SD performance shop fire a few years ago when getting a full port job.
I picked up two more Holley SDs yesterday from a very nice gentleman, I thought is would be interesting to post pics here since they are the two different versions I know of the SD. My memory is blurry but wasnt one made to line up with the shaker hood or something? The carb pad position seems a little off and one is obviously.more open ( less casting) . Can someone shed aome light on this . Just curious. Peter |
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#2
09-13-2025, 02:04 PM
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Nice! The one that's not cut out around the EGR boss is the first design. I always thought they changed the casting a bit to save on material. I never noticed any other differences. The first design definitely weighs a good amount more than the second.
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#3
09-13-2025, 02:27 PM
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Quote:
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74 Formula Below motor destroyed fall of 2023 469, 6X-4's, 72 Intake, Ramair Manifolds. 3 inch exhaust with x-pipe Custom Roller Cam, 1.52 Roller Rockers Quadrajet done by Cliff 3:42 gears 12.061 @ 110.74 12.092 @ 112.43 12.128 @ 111.71 461 stroker Edelbrock 87 cc dport heads Performer RPM Same Ram Air manifolds, and quadrajet 75 Formula 400 / 4-SPD matching numbers 
Last edited by form74; 09-13-2025 at 02:33 PM. |
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#4
09-13-2025, 05:00 PM
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There are three versions that I know of. I'll look after the show to see if I have pictures of them.
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So long, farewell. |
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#5
09-13-2025, 08:26 PM
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Quote:
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#6
09-13-2025, 09:55 PM
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First one has more aluminum and
FIRING ORDER 18436572 in front. Second one had FIRING ORDER 18436572 in back. Third one had FIRE ORDER 18436572 in back.
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So long, farewell. |
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#7
09-14-2025, 10:12 AM
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Those manifolds are crying for a bead blasting to look pretty again
 I'll have to go in the attic and look at mine. Never been on an engine, got it form Speedway years ago! They also have the W casting mark from Winters foundry like most of the factory GM aluminum manifolds.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#8
09-14-2025, 11:10 AM
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Quote:
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#9
09-14-2025, 06:17 PM
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FIRING ORDER VS FIRE ORDER
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#10
09-15-2025, 02:12 AM
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Edelbrock Buick Performer Carb pad is set. about 1" to the rear vs B4B.
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GOOD IDEAS ARE OFTEN FOUND ABANDONED IN THE DUST OF PROCRASTINATION |
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#11
09-15-2025, 09:21 AM
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Quote:
__________________
74 Formula Below motor destroyed fall of 2023 469, 6X-4's, 72 Intake, Ramair Manifolds. 3 inch exhaust with x-pipe Custom Roller Cam, 1.52 Roller Rockers Quadrajet done by Cliff 3:42 gears 12.061 @ 110.74 12.092 @ 112.43 12.128 @ 111.71 461 stroker Edelbrock 87 cc dport heads Performer RPM Same Ram Air manifolds, and quadrajet 75 Formula 400 / 4-SPD matching numbers
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