Holley square bore adaptor

[1911a1]

I pulled the Edelbrock carb off my 318 that has a 1970 340 spread bore intake. The adapter was the simplest flat steel one they make. I didn’t look to see if the throttle blades were not opening all the way, but now I been trying to find an adapter that is what I’m trying to avoid now.

Will a carb spacer raise the Holley 670 to avoid this?

I purchased a Edelbrock aluminum spread bore adapter on eBay that was a fail. It’s the one with the 4 angled holes. I should have found the one with the big open middle at least I think so.

Any help will be appreciated.

 

[lemondana]

The 70 340 intake is not the spreadbore intake. 71 was the first year.

 

[1911a1]

https://bluestarperformance.com/wp-content/uploads/2015/01/IMG_7598-324x324.jpg

 

[1911a1]

It looks like this one

 

[RustyRatRod]

That's not considered a spread bore intake. Throw us a bone here. What carburetor are you trying to bolt on?

 

[Killer6]

That's not considered a spread bore intake. Throw us a bone here. What carburetor are you trying to bolt on?

"Holley 670", guessing Street Avenger.....

 

[RustyRatRod]

"Holley 670", guessing Street Avenger.....

Oh some junk then. I missed that somehow. Thanks. Why do people make things so difficult? Just put a danged Carter style carburetor on there like the factory used. An Edelbrock AVS comes to mind.

 

[PRH]

“If” the throttle blades on a SA670 interfere(or some other part of the linkage) with the stock square flange 340 manifold(I would test fit it with no gasket), then you need a simple spacer, not an adapter.
Something like a 1/2” 4 hole unit should take care of it.

Allstar Performance ALL25983 Allstar Performance Drag Hi-Flow Carburetor Spacers | Summit Racing

(Actually, the steel Ede plate you already have may be enough to take care of it, if there is an issue)

 

[oldkimmer]

Post some pics of what u have. Kim

 

[Ant]

Provide pics of the adapter carb and visible issues, so I can tell you how to screw things up.