if the motor is the wrong color maybe it was a replacement---on our 69 plymouths when they got close to 70K they were sent into the plymouth dealer for a transmission replacement on warranty---some cars with over 100k would have engine issues and new engines were bought and replaced by our shops personnel---shops guys were strictly RnR guys- tires- lubes-tuneup-----even front end work was sent out----when the 69's were auctioned off city employees were not allowed to bid---i heard a guy bid the first car up to $169 and got it---the auctioneer offered one or all same price and this guy took every car--later heard he was a used dealer and he covered up the roof holes and A pillar holes with a vinyl roof and sold the hell of them---sadly a bunch had new trannys and new engines----oh well---took more than few 140MPH runs in them---and some claimed they were radared at 155mph--but i personnaly didnt see that....bob