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Holley Vac Sec to Mech Sec conversion

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Old 02-17-2022, 04:36 PM
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Car: 1982 z/28 Right hand drive
Engine: 377 AFR195 750DP Solid cam 10.25:1
Transmission: TH/350 3200 stall spohn conversion
Axle/Gears: 10 bolt 3.42:1 Eaton Trutrac.
Holley Vac Sec to Mech Sec conversion

I have a car running a Holley 750 street HP original no choke model. 0-82750

with the mixture perfect at operating temp, its lean on cold start and struggles until warmed up,, typical of no choke carbs.
wind out the mixture screws out 1/2 turn she starts easier but is rich when warmed up..

i would like to buy a choke model Holley 750dp like the 0-4779C but are expensive new..

I have at home a brand new 770 Ultra Avenger 0-86770 but its vac secondary electric choke
Can this new 770 carb be converted to Mech Secondary and mechanical choke.

I am just trying to save buying a new carb by converting the above.

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