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What size holly 350 or 500 how to tell

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How do I tell if my 57 Thunderbird is a 2 or a 4 barreled carb

Hi Holly:
- Remove air filter from top of carb.
- Look down at top of carb
- 2 holes (2 barrel)
- 4 holes (4 barrel)

Aug 28, 2015 | Cars & Trucks

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The holly tree branches and leaves are turning brown and dying what can be done to stop the tree from dying?

  • Hi Elaine:
  • I've found that holly likes shade and does not like drought. Try giving it a really deep watering once a week.
  • How big and established is the tree?
  • Did the problem just start, and what changed for the tree's environment?

May 18, 2015 | Cars & Trucks

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Hi I have have a small block chevy with a good size cam headers Holly . The engine makes great horse power at all rpms. But it stubles from a dead stop . Do i need to advance the timing. ?

Either timing or it needs a bigger shot of fuel when you step on it. Bigger accelerator pump shot might help. Is the carb jetted correctly for your application?

If you need further help, I’m available over the phone at

Nov 21, 2010 | Chevrolet Nova Cars & Trucks

1 Answer

Have a Holly 350 2bb on 302 FORD CLEVELAND V/8 IT

302 is a small block. Cleveland was a line of big blocks Ford made.
But it sounds like you just have a weak power valve.

Jun 06, 2010 | Ford Fairmont Cars & Trucks

1 Answer

1961 t-bird carb adjustment

run both screws all the way in and twist back out 2 turns on both. then work with how the car smells. you can tell to rich or not

Feb 12, 2010 | Ford Thunderbird Cars & Trucks

1 Answer

Engine sounds powerful but when you take off its just loud and has no power behind it, put new plugs wires and vacume advance on it and still no power, its a 350 with a pretty large holly on it though not...

holly carborators usually get adjusted with the season... the floats on the older hollys use to get stuck all the time and cause poor performance suggest a rebuild kit

Dec 25, 2009 | Chevrolet Camaro Cars & Trucks

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