New, and or replacement, oil pump drive shafts are available for all pre-62 v-8 engines. A new, ‘tall’, driveshaft is required when using an LA style distributor. The requirement is based on the change in the height of the block where the distributor mounts. The LA block is approximately 0.600″ shorter than a 392 block and approximately 0.300″ shorter than the 331-354 block. The Dodge 241-260-270 block has the same height as the LA and the LA distributor is a direct fit without additional changes. Dodge 315-325 and DeSoto engines are essentially the same as the Chrysler 331-354.
See photos for details of the following parts.
Replacement shafts are made from alloy 4140 and are precision ground to exact tolerances. The ends are induction hardened to Rc 50 for extended service life.
Part # . . . . Description . . . . . . . . . . . . Price 8-120 . . . Stock Length Intermediate shaft, . . . . 392 . . $ 35 8-121 . . . Stock Length Intermediate shaft/gear, . 392 . . $ 65 8-122 . . . Stock Length Intermediate shaft, 354 & others . . 35 *******Limited availability, call for inventory check******* ~~~ 8-124 . . . no longer available 8-125 . . . Long Intermediate shaft/gear, 392 use with LA dist 120 8-126 . . . Long Intermediate, 354 & others with LA dist . . . 35 8-127 . . . Long Intermediate shaft with gear, 354 & others . . 65 ...please call to verify availability of stock length shafts..... Three intermediate shafts, used/stock 392 on left, stock 354 center, 'tall' 354 on right:
View of top of the three gears with position of shafts:
Close up showing the top of the ‘tall’ 354 gear and and the shaft sitting flush:
Comparison of a stock 392 shaft (on top) and a ‘tall’ 392 shaft at bottom. Note special collar at the top of the gear:
Close up showing the position of the shaft relative to the top of the gear. The collar is required to capture the tang of the distributor shaft and keep it in alignment.