If there's one thing certain about a Muscle-era Mopar, it's that the unibody construction allowed the body to flex and "give," which isn't a problem when it comes to daily driving. But you take into ...

It's a well-known fact that cars with unibody construction—aka unit body, subframe, or stub frame design—are designed to satisfy an automaker's need for both strength and low manufacturing cost. Yet ...

You can dramatically stiffen up your unibody Mopar with a set of weld-in subframe connectors from Reilly Motorsports. We show how easy it really is on our 1968 Plymouth Valiant project car.