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I am installing a different tank setup in my Comet. I bought what Summit and RCI call a fuel cell. No foam in it, Basicly just a aluminum tank with AN fittings. I am installing it where the old tank went. And really want to be able to fill it from the factory fill location. here is picture of tank in trunk with the tanks fill and the factory fill marked.
I am going to buy a different fill neck for tank, a 45 degree instead of straight, RCI Racing 7036B - RCI Fuel Cell Fast Fill Hose Valves - Overview - SummitRacing.com
And run a fill hose something like this to the factory fill location in tail panel.. In picture just used old rad hose had laying around but will get correct hose when installing.
I think there is enough drop so the new tank fills ok. Does this look like it would work?
The new tank is about 2 inch higher than old tank.
The new tank has Fill valve, sending unit, and AN connections for fuel feed, fuel return, and roll over vent.
Plan "A" is mount tank, hook up a fill hose from new tank to factory gas fill and factory cap which is vented. Run feed to mech. fuel pump on engine, cap the return and roll over valve fittings.
Plan "B" is mount tank, hook up fill hose from new tank to factory location but instead of using factory vented style cap use a non-vented cap something like on new tank. Cap the return line, run feed to mech. fuel pump on engine, and use the roll over vent since cap won't be vented.
Opinions?? Plan "B" better? where should I run the rollover vent line if going with plan "B" or is plan "A" OK?
Thanks for any and all help/opinions
Lou
I am going to buy a different fill neck for tank, a 45 degree instead of straight, RCI Racing 7036B - RCI Fuel Cell Fast Fill Hose Valves - Overview - SummitRacing.com
And run a fill hose something like this to the factory fill location in tail panel.. In picture just used old rad hose had laying around but will get correct hose when installing.

I think there is enough drop so the new tank fills ok. Does this look like it would work?
The new tank is about 2 inch higher than old tank.
The new tank has Fill valve, sending unit, and AN connections for fuel feed, fuel return, and roll over vent.
Plan "A" is mount tank, hook up a fill hose from new tank to factory gas fill and factory cap which is vented. Run feed to mech. fuel pump on engine, cap the return and roll over valve fittings.
Plan "B" is mount tank, hook up fill hose from new tank to factory location but instead of using factory vented style cap use a non-vented cap something like on new tank. Cap the return line, run feed to mech. fuel pump on engine, and use the roll over vent since cap won't be vented.
Opinions?? Plan "B" better? where should I run the rollover vent line if going with plan "B" or is plan "A" OK?
Thanks for any and all help/opinions
Lou