D343 Motors were used in earlier Model Scrapers 631's and later replaced By 3408's . Great motor but very expensive to repair . LJ
also used in backs of 666's and 769 dumpers, its the overhead cam motor, Oh nearly forgot also stuffed in the 830's, its a common motor to find in kit with a good rep.
tctractors
They were used in 988 loaders, 630B, 637 and 633 scrapers too.
657, 657b, 666, 666b, 768b, 769, 769b, 824b, 825b, 826b, 983, 988
Also as a truck engine 1693
Later Bob