I'm working on a '68 B body right now that is 440, 4 speed and Dana with 26 inch radiator core support. Of course, not much of that is factory! It was originally a 383, 4 speed, 8.75 car with a 22 inch radiator. Hard to tell now though.

A friend of a friend called me a while back for some help with a car he had bought at an auction. 440+6, four speed car. The car was stunning, looked just perfect on the outside. Got it up on the lift and noticed a 22 inch radiator, 23 spline transmission and 8 3/4 rearend. Okay, not exactly what was advertised! The guy was still happy with his car since mostly he just wanted something that looked great. And this car looked fantastic.

I grew up in a Chrysler dealership my dad owned, in 68 a local guy order a 68 RR 383 4spd, an had my dad check the box for the dana, Chrysler wouldn't do it an my dad had to give back the extra money for the dana. true story and I own the car now.