Should I make the swap to G3?

TT5.9mag said

The supercharger changes things drastically. Even at 5-6 psi the 500hp 408 will now be very close to the limits of the block. Trust me it will always be on your mind when you stand on it. If any kind of forced induction is in your future, do the g3 swap and never ever look back.

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Good point.

Add that you can buy a positive displacement SC with a built in intercooler for a G3. Nothing like that for the LA. Certainly a centrifugal or turbo will need a front mount IC either way, but a roots style with a built in IC just seems like a much cleaner install.