8 1/4 rear disks

will do I needed something on the rear, manual disk/drum barely stops the 225 I can imagine when the 440 goes in. Also adding a booster and adj prop valve. I will take pics as I go.
Ray

Something is wrong with your brake system then.

I have factory Manual Disc/Drum setup on my '74 Duster and it would lock up all 4 tires and stop on a dime (with 9 cents change), at 65+mph, if you needed it to.

My '73 Duster has Manual Disc/Drum and the stopping power is even more impressive. On the '73 I have 11.75" Rotors with Floating Pin Calipers from a Charger, and a Master Cylinder for a "Power" Application instead of the original Manual application master cylinder.

I have a similar setup on my D50 (11.75" Rotors, with Floating Pin Single Piston Calipers and 10" Drums), They will lock up Four 40x17-15" Tires at 60mph and bring a 4,500 pound truck to a screeching halt in the blink of an eye.


EDIT : Not to mention, the 6-71 Blower setup on my '73 and '74 makes the 340 weigh almost as much as a 440