Tony,
After installing quite a few Keisler transmissions for myself and customers,...I'll give you my
on the 70 Charger install, as I have performed that as well,.....purchase a repro 4 spd hump, forego the sheetmetal peice supplied in your kit, cut the floor open for the "factory" repro 4 spd hump, don't install it yet....mock up the install by installing the bell, and transmission, along with the supplied tranny crossmember,....check your installed transmission angle, the tranny tailshaft should be pointing downward,.....useing an inclination meter, measure the rear pinion angle,...the pinion will point upward(note if your performing this with the rear suspension hanging, the pinion angle changes,...measure with the car on the ground, sitting on it's wheels, or sitting on a 4 post drive-on ramp),...you want to have the transmission and pinion on equal paralell angles of one another,...example 5 degrees - on the tranny, and 5 degrees + on the pinion,....measure the rear pinion, factory is usually 3-5 degrees +,....unless you've modified your rear end perches/springs/etc,....you need to determine that the engine/transmission driveline angle is exactly what you want, you may need to shim the tranny mount to acheive the angle needed, and in most cases, with the Keisler, it's upward, which means more tunnel mods to get the tranny into the hump,....don't be afraid of cutting the floor, your going to put a carpet and/or console over it,...so why fuss?,....driveline correctness and operation are more paramount,...last thing you need is vibrations from a poorly set-up driveline,.....the Keisler aluminum case Tremec runs hot in OD mode on extended runs, so the more room you have around the tranny for airflow the better,...use some dynamat on the floor for heat barrior after you've determined the floor mods,...with the tranny mocked up, and the 4 spd hole cut out in the floor open, it gives you a better idea of any interference you need to address,....then fit the "factory" 4 spd hump, there's plenty of clearance around the hump, but you'll need to weld up the hole were the original shifter would mount, as the Keisler shift tower is located approx 3" to the center of the factory hole,...the supplied Keisler shifter offset will center the shifter in the factory console, or under the shifter boot, should you desire no console,...the factory 4spd shifter has a 3" offset as well, just in the other direction to center the shifter, so don't worry about the location, it will be correct with the Keisler,....but do follow the instructions supplied from Keisler, if you don't understand something call Keisler,....if you wish to PM me here at Moparts, I can answer most if not all your questions regarding your install,....trust me after you've installed your Keisler TKO, correctly, it'll be the only transmission you'll prefere to have in a car
Here's a driveline pic to help you out, regarding driveline correctness,...you don't need the driveshaft to determine your tranny and pinion angles,
Mike