1975 case 450 engine problem

hi guys,

sorry for my bad english here we mostly speek french so ....

here is the deal i found a case 450 1975 on kijji the onwer say it have engin problem he just want to get rid of it so i didint bother him too mutch

the machine is ruffly an 1 houre drive from home so i don t want to go back and forth to meny time

witch engin a 1975 case 450 should have ? ther is any known common failure/ problem on theas machine ? wath should i look for ? i got little experiance on dozer/track loader but not mutch in reparing them



thanks for your help