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This is what you have.
The flange is 5/16”. The tubes are 1 5/8”.
The outside of the tubes are not welded and you can weld outside and enlarge the tube inside.
That’s good for the 302 but small for 500 HP tho.
If you go 347 maybe send them to someone to be duplicated in 1 3/4” tubes.
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 Chaney Shores Studio
Last edited by sunman; 09-11-2022 at 09:06 AM..
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