The M88 had a gas version of the 1790 ci Allison (M60 was 750 hp diesel), it had a FI, twin turbo, ............
https://www.youtube.com/watch?v=Awms8rZ2c_g
Maaann......do you live near central Florida? I've got this big (really big, and it is heavy too!
) restoration project involving an AV-1790...........I'll buy the beer!
I realize that the sixties was a while ago (and I can't remember what I ate for breakfast
), but just a little detail: These engines were of Continetal Motors design with an Allison transmission ('cross-drive'), the M48's came with the AV- & AVI-1790's these being the carbureted and then changed to fuel injected versions of these V12 air-cooled engines; and the M88's came with the AVSI-1790 which was the supercharged/fuel injected gasoline engine (had more to tote and needed the extra H.P.
). The centrifugal superchargers were mounted low and center on the sides of the oil pan and were driven by shafts from the inside of the pan off the crankshaft. Later these gasoline engines were replaced by diesels (AVDS-) exhibiting twin turbos mounted high and to the rear.
This evolution from a naturally aspirated gasoline engine to mechanical fuel injection, to supercharged & fuel injected, then to turbocharged diesel, with significant increases in power output while also increasing fuel consumption efficiency, was quite the achievement on basically the same engineering foundation of not too modern of a design.
Scott.