Holley 670 TBI and AN fittings

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m0ntecarloss

Holley 670 TBI and AN fittings

Post by m0ntecarloss »

Sorry for lengthy post but I am not quite sure how to proceed:

I am setting up my fuel system from the tank forward and plan on running braided steel lines in the engine bay and would like to connect them to my holley throttle body unit.

Trouble is, holley (and GM) run funky special reducer fittings for the fuel supply and return. They make adapters that screw into these to give me the AN fitting but they will not fit in my application.

What I was thinking of doing is removing those fittings that are in there (shown in picture below), drilling and tapping the holes for standard pipe thread and just using pipe thread to AN adapters....

Anyone have any thoughts on this?

These are the fittings that holley and gm have in there now

Image

This guys website has quite a bit of information on the issue:

http://z28boy.cz28.com/mods-fuellines.htm

Holley does make fittings that I want but you can't buy them anymore :(
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ChevelleFan
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Post by ChevelleFan »

You might want to look up Doug Flynn on chevytalk.com, in the EFI forum. He's works for Holley and might either have some insight for you, or could possibly help you locate those adapters they used to sell. His screen name over there is "Doug F". He's a pretty helpful guy.

-Dave
'70 Chevelle 406/TH350/3.55 / Hotchkis A-arms / Hotchkis Springs / B-body 12" brakes / 1.25" F-body swaybar
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