Engine profile
B-series big-block · 400 cubic inches · Chrysler
Identification reference
Source-backed component numbers, codes, stampings, and application notes.
Source also places the casting date on the driver side of the block. Car-specific casting date acceptability remains unresolved.
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Source states specific Thermo-Quad versions were standard on the 400 and 340, but does not provide Carter list numbers for the 400 application.
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Hemmings attributes this transmission split to Mopar historian and author Steve Magnante.
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Source says engine model, build date, shift number, and replacement-information symbols may also be visible, but does not normalize acceptable date windows.
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Hemmings reports this as varying by factory paperwork; distributor part numbers remain unresolved.
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
Sources: 1972 Plymouth Road Runner and Road Runner GTX Buyer's Guide
1 linked car page.
2-door hardtop
400 four-barrel B-series V8