No need for 1/2" line with EFI until you get into the 650-700hp range. Mine made 470hp and I have 3/8 feed and return and there is no issue. Look at a factory production car, I can only think of the Hellcats having 1/2" line OE.
I wouldn't use aluminum line on a street car since it is much easier to damage. Steel, or if that's too hard to bend, you can just do braided extruded teflon (aeroquip is the best). I used a reproduction 3/8" feed line for the feed and made my own section of return (and used the aeroquip braided teflon on the remaining sections where flex is needed). I doubt I'll ever have to mess with any of it.
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Also, you can pull the intake with the distributor in, or you can just mark it and stick it back right where it was, which is easy because of the screwdriver tip:
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