Durable, Streetable, Economic 318

There may be some internal difference in parts due to upgrades through the years but as a whole unit, not counting the converter, the '69-73 727's will interchange and the '69-73 will fit in the '68 with minor wiring mods. If you don't need back-up lights, you can put the '68 trans in the '69-73 models. I know....those trannies will fit other years and models but we're just discussing 340 cars here, ok?