Best motor for 69 Barracuda

300hp is easy. If that's all I wanted I'd go 340 or 360 (I have a spare 340 in the garage, so that's what I would use). BUT, 400hp is easier and has better street manners with more cubic inches.

The rest of the car would be built that same for me whether I went big or small block. Same brakes, same torsion bars and sway bar, same wheels/tires, etc.