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#1
01-30-2015, 10:43 AM
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Performer and Holley Carb
IIRC the intake is drilled for both spread and square bore carbs, correct? Any general problems associated with bolting on a 750DP, other than the linkage and different fuel entry?
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Robert 69 Firebird-462/Edel round ports/currently running the Holley Sniper/4sp/3.23posi/Deluxe Int/pwr st/vintage air/4wl disc( a work in progress-always ) http://youtu.be/eaWBd3M9MN4 |
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#2
01-30-2015, 01:27 PM
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They sell an extra plate but I never had problems with my 750 VS sealing.
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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 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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#3
01-30-2015, 02:13 PM
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I think they still sell the square flange plate to help seal the gasket to the spread bore intake. I always used the plate for piece of mind. I figure it helps support the holley base plate a bit more for an easier seal. I never like cranking on the nuts too much as they can distort and sometimes crack.
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#4
01-30-2015, 02:50 PM
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Nothing wrong with a q-jet???
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#5
01-30-2015, 04:01 PM
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Performer/Holley
Use a 1" or more spacer if possible with that combination. The carb butterflies stick pretty far down in the intake when open and hurt the transition flow.
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62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs |
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#6
01-30-2015, 06:43 PM
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Quote:
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Carburetor building & modification services Servicing the Pontiac community over 25 years |
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#7
01-30-2015, 07:49 PM
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I did have to massage the center divider for butterflies a little but I think that was for the Q jet. I have that on now. Ran the Holley for a few years on the 81's 400 Performer
__________________
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 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
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