Just give you my experience with one of our gas tanks. I had the outside painted with a very durable paint and then decided to sump the tank. I cut 3 large holes with a hole saw and installed the sump but forgot to remove the painted surface under the sump which was then emerged in the gasoline. I ended up with paint particles in my fuel filter. Morel of story, I would buy a new tank before ever coating the inside. That way you'll always know the inside is totally clean and will last a life time.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 3:90 gear. 28" slick.
Best so far 9.95@135 mph. 1.39 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exhaust
950 Quickfuel.
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