The Direct Connection B-engine/A-body K-member, part number P4007935, was specified in Bulletin #39 to use production engine mounts, part numbers 3642814 and 3642815 with bolts, part number 6030203, and nuts, part number 6030478.
These production mounts were used with the 400 and 440 engines in 1973 - 1978 B-bodies, and 1974 - 1978 C-bodies. There were multiple versions of the mounts, but it just involved different durometer strength rubber inserts. The stronger inserts were typically used in fleet or heavier use applications. The different versions are identified by part number and/or paint marking. The mounts are left and right specific, but interchange within the same side.
The following lists describe the mount part numbers:
- 3642814 - white, right
- 3817124 - green, right
- 4001746 - no paint, right, released for Cordoba and Charger
- 3642815 - white, left
- 3817125 - green, left
- 3817117 - orange, left
- 4001747 - no paint, left, released for Cordoba and Charger
The big block mounts differ from the small block mounts, but the bolts and nuts are the same. The big block mounts are taller and differ for the engine block mounting. The following image shows the difference:
View attachment 1716497813
The following image shows NOS mounts, which were typically bare metal with a light metal preservative coating, with the white paint marking:
View attachment 1716497812
Small block mounts and inserts are available, but the big block mounts were not serviced as a complete assembly by most of the aftermarket. The inserts were and are available, although current production quality is typically poor. The inserts are the same between the mounts.
