Found some Hall Scott specs b 5 3/4 x 7 1091 cid comp 6,5 on gas 8.1 on lpg hp 332 @ 2200 torque 960 @1200 on lpg hp 368 @2200 torque 1091 @1100 For the baby scott 5x5 590 cid on gas 6.6 comp hp 239 @2800 torque 490 @ 1600 on lpg comp 8.7 hp 256 @2800 torque 530 @1600 .These numbers may not impress but it wasn't until the 70's that diesels got near this proformance and they were turboed where Hall Scotts were always natural asperated. In fact the first high proformance cat diesels (343 /1693) were diesel copies of Hall Scotts
