1976 Feather Duster comes with 383

They had to crimp the hood bracing and sheetmetal because there is no way to "weld" aluminum & steel. Not sure how they did the trunk, unless the steel edges of the lid are folded over the aluminum underside.

It's a neat project. But once you start adding V-8 stuff, including 727 trans, rear, suspension, etc. The weight will rise quickly.

Make sure you check/upgrade the brakes also to handle the extra weight and HP/speed.