My 74 duster, 40 years bein the family car

BB-Dave said
COOL car, keep her going in the family, keep her as original as possible!

Not knowing '74 Dusters, what motor is in it?

It's a 318. Dusters back from 70 to 76 came with 198s, 225s, 318s, 340s, and 360s. After awhile people started putting 440s in them.