Custom Aluminum Gas Tank Help

[Dodge68charger]

Hey Guys Im Going To Make My Own Aluminum Fuel Tank For My 69 Truck. I Know You Can Buy Them But Like The Challenge. Always Trying Something New.

First Question Is Does Anyone Have Any Reference Points On The Frame I Could Use For a Stock Or After Market Fuel Tank So The Bed Fill Cap Is In The Center Of The Bed..

Also Any Suggestions On The Hole Sizes I Should Go With For The In Tank Anti Slosh Baffles

Any Help Or Pointers Would Be Appreciated. Thanks
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