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"Base Plate" For Holley "4780-5" Double Pumper Carb "Base Plate" For Holley "4780-5" Double Pumper Carb
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Old 09-15-2016, 10:51 AM
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Default "Base Plate" For Holley "4780-5" Double Pumper Carb
I'm looking for the noted part - base plate only - any ideas is to where to purchase one?
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Old 09-15-2016, 01:06 PM
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I'd suspect that to be a part available from Holley only.

Cheers!

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Old 09-15-2016, 01:50 PM
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Summit is where I've bought mine.
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Old 09-15-2016, 03:16 PM
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A 4780 (800 DP) is the same as a 4779 (750) throttle body, 1 11/16 throttle bores.

Shouldn't be too hard to find.

Here's one here:

Holley Brand 4780 800CFM Double Pumper Base Plate Assembly All New Complete USA | eBay

What's wrong with yours?

Gary
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Old 09-16-2016, 08:01 AM
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Quote:
Originally Posted by Gaz64 View Post
A 4780 (800 DP) is the same as a 4779 (750) throttle body, 1 11/16 throttle bores.

Shouldn't be too hard to find.

Here's one here:

Holley Brand 4780 800CFM Double Pumper Base Plate Assembly All New Complete USA | eBay

What's wrong with yours?

Gary
I was installing it and tightened too much - broke off one side of the plate and cracked two sides - I'm not really mechanically inclined - just a mistake.

thanks for the link. Actually, I've found out that the 4780 has 5 carbs, from 4780-1 to 4780-5 with two different base plates - 4780-5 is 12R11090AP (part number) with two others in the series 12R11090A - that's the problem with purchasing one from ebay, etc.
Last edited by bliss; 09-16-2016 at 08:24 AM..
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Old 09-16-2016, 11:05 AM
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thanks - Holley had one - ordered!
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