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If the drive shaft has one tapered down end, that end was installed to the rear by Chrysler, at the axle, as shown in the following image: Some propeller shafts, or drive shafts, have one tapered end, some have two, and some have none. Other variations have inertial dampers on the front end...

The 1973 Challenger was only available with the 8-3/4" rear axle. The only 8-3/4" axle center section in 1973 was the 2881489 housing, aka "489", with a 1-7/8" pinion. The standard gear ratio for the 1973 Challenger was as follows: 318 or 340 with 3-speed manual transmission: 3.23:1 340 with...

The rear bumper guard lower attachment bolt is a 5/16-18 with a 1/2" hex head.

The door lock cylinders in E-bodies are the same as other car lines, but the cylinder is encased in the door handle assembly. The lever for the rod, which attaches with a "e"-clip, has a deeper step than other car lines. The following images show how the E-body door lock cylinder fits in the...

The pictured wiring harness is for a 1974 E-body with a Rallye instrument cluster.

The instrument cluster wiring portion branches from the main wrapped harness in the same area for both standard and Rallye clusters. From there, the Rallye cluster wiring is a little more involved. The following two images show a Rallye cluster wiring portion and a standard cluster wiring...

Part number 3438178 is listed as originally having a double pulley for an air conditioned application. It likely has been changed, but may have been originally mated differently. With the eroded marking, and the likelihood of mixed parts through a rebuilder, it might not be your original, or all...

As Floyd notes, this alternator looks to have gone through a mass rebuilder process and the end shields (housing) were blasted, or more likely tumbled with metal shot, which damages the markings. The stamped part number appears to be 3438178. Alternator number 3438178, as stamped on the...

The torque specification for the J-bolt lock nut is 50 inch-pounds (maximum). The torque specification information is in section 14 (Fuel) of the factory service manual.

The bulk of the holes with rubber, or sometimes plastic or metal, plugs are for drainage of the cleaning, treatment, and primer solutions used in the unibody dip processes used when the cars were constructed as described in the following image:

I have no real idea about the valuation in today's market(s). To me personally, not much, as I have a good one in each car, and a couple on the shelf. It does have the broken areas, albeit mostly cosmetic from the pictures. The 2936622 part is reproduced. The condition of the core determines...

The pictured item is the heater box assembly for a 1972 E-body, without air conditioning. The assembly was built on Monday, September 13, 1971. 2936623 is the part number for the front part of the housing (toward the firewall), which was not a service part separately, but was part of the duct...

The pictured wheel showing the number stamps was made in 1975 at Motor Wheel plant # 1. This is a 15" x 6.5" Rallye Class I wheel, part number 3699066, which was used on 1976 B-body Fury, Coronet, and Charger models through 2/17/1976. This wheel was originally equipped with trim ring part...

The 1970 Challenger has an overflow tube from the nipple at the radiator cap opening, like other models. The tube just directs any overflow to the ground below the car. Except for limited release in some 1972 C-bodies, the cars of that era did not have a coolant recovery system, called coolant...

The intake valve seats do not need hardening, or hardened seats installed. The intake valves do not run hot enough to cause excessive wear that an exhaust valve can experience. The exhaust valves and seats run much hotter, so the "pounding" loads in operation can cause them to wear faster, or...

Chrysler introduced induction hardening of exhaust seats on the 1972 slant six engines. The process was phased into production throughout the year to all engines as processes were adjusted and equipment added. For 1973, all engines received induction hardened exhaust seats in the heads and...

Yes, the yokes can be swapped, with some considerations. As noted, most factory '489' differentials (full casting number 2881488 or 2881489) use the crush sleeve, which should be replaced and the crush reset when any parts replacement is performed. The yoke nut can be marked and the turns...

I'm doing my part...

The temperature operated vacuum by-pass valve, or thermostatic ignition control valve (TIC), was released for some 1973 engines, including the 340, typically based on region or accessories. The valve is used to reduce the possibility of engine over-heating under very high heat conditions. With...

Intake manifold casting number 3671918, part number 3698656, is the original intake manifold used on 1973 340 engines. The suffix of "A" or "Z" on the casting number is a foundry reference and does not affect the function or application of the manifold. The "Z" suffix is on the earlier...