So I decided to run 3/8 line and AN 6 front to back. AN flex at the front, hard line in the middle, and hose at the rear.
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Here’s the lines attached to the Sniper and heading back to the firewall.

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Next, they run over to a gauge for reference.

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Run down the firewall

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I made a small bulkhead to mount a couple of fittings.

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Hardline fittings

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Routing along frame

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Rear bulkhead

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Around the tank

So, any comments from the esteemed experts around here?