Ricola if using "bolt on" fittings you can have the line come out as much as you need for fittings. Then, just use rubber grommets where the line goes through the pan.
To use the bulkhead fitting's you would need to cut access panels that could be removed (bolt in, not welded) later if needed. Also, you would need access to put the nut on the backside of the bulkhead fitting. IMO wouldn't trust a mechanical connection sealed inside the tunnel. I would like the option to "check" the connections from time to time. (maybe I'm just paranoid
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1970 T1 W/MassIVe 2913cc RAT/?EFI? w/direct fire (very soon) and 915 trans
1962 SC 1776cc SP 944NA brakes, 993 wheels
VKG