To Mod, or Not to Mod, that is the question. What will break at 500hp?

The car is a mostly original 1967 Newport, 2dr, 383 4-barrel, 727. Body is in good shape, interior is a little rough with rips in the front seat and a missing headliner. Engine runs okay, but is down on power and smokes a little on startup. It needs more power. 450-500hp at the crank would be a reasonable start.

Option 1. Rebuild the 383 with 500hp as minimum goal, bore it out, stroker kit, aluminum heads, aggressive roller-cam, gapless rings, EFI
Option 2. Mothball the 383 and...

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