Right bank issue

[dtcerrato]

We must not forget to mention Naval vessels. It was common to see eight 671 Gray Marine Detroit Diesels (two sets of quads) in naval vessels. My favorite (maybe because Dad and Uncle - his only brother, served in the South Pacific along side each other) was the PT Boat & (destroyer escort) Lightest & fastest on the water made of plywood and powered by 671s. One of the facts that send me about the early post war GMCs was the fact that they were recipient of the vast stockpiles of aluminum and 671s that went to public service sector along with commercial aircraft & trains.

[luvrbus]

GM had Stewart and Stevenson in Houston where I grew up developed the 6-71 for military use, the quads were developed for oil fields by Stewart and Stevenson they still have the 1st made.
The aluminum blocks were all made by P&H and Gray added their thing Gray never built a complete engine from scratch.GM did do a ton of 53 series aluminum engines later for the military.
Those aluminum blocks 6-71 are the pits to install liners in you don't slide those in and out by hand like the cast iron blocks