72 Duster Resurrection

Theres an 8.8 thread on here, use the search function to find it. It tells you all you need to know.. i have my 8.75 now for the 67, so the moneys spent, however i am looking for a xploder sport trak 8.8 for the 69 notchback. I did find the only one at my local 10 acre yard, when i looked it was still under the truck price complete was $300 cash. Not bad i think , but in yellow grease pencil it said 4.10 ratio on both rear fenders. Unless you have a good deep overdrive, the 4.10s are awful on the street. I have 3.73s going in my cuda. With the tore diameter i am going to use , and an A833 O/D 4 speed box i will be about 2,500 rpm at 75 mph. Thats doable to keep up with traffic, and keep the rpms comfortable for the engine.

I want 3.73s in the 69 because i will be backing that with probably a mopar A518 out of an early 90s truck Its basically an A727 with a control solenoid. This can be wired to ign hot and a toggle switch. It basically puts it in overdrive and drops 200-300 RPM when energized. Around town you leave it shut off and the trans acts like a normal 3 speed A727. On the highway at about 55mph engage the solenoid with your switch, and theres your overdrive. This way it will get ok mileage and be snappy with the gears, and on the highway, its got an overdrive. Plus the A518 is a variant of the A727, so it fits an A body trans tunnel if only tightly. .