Mustang boss 302 vs mopar!

Some people here are confusing things.

The standard, Ford 302 (289) was little more than a basic V8 much like the 318 (273) or the old 307 (283) Chevy used back then.

The Boss 302 and Chevy 302 (both performance engines) were not built to compete with a 340 on the street. They were built for one reason only, to be a solid performance foundation, within the 5 liter rule, for Trans Am racing.

If you want to compare apples to apples you need to place the 340 against some of the high performance 350s or other non displacement limited small blocks from back in the day.

The outcome will still be the same, a 340 in a light weight a-body was a potent combo.