Teenagers / Classic Cars ??

as a parent and an old car enthusiast,i'm pretty sure Id like my son's first car to be something he worked on to fix up so maybe he will appreciate the time and effort it takes to build and maintain a car and will probably be a Lil' more careful since his time and money will be in it,he has a 72 duster at this time it has a 340/727/8 3/4 with 3;55's but Looks like a slanty with auto and a 2;76 will be goin in there,I have an engine ready to bolt in with headers and super six setup so thats the plan.....when he shows maturity about driving ,which he does at this time but thats prolly cause I'm lookin on then we can see about a beater car and he can put the goodies back in,i'm thinkin i'll make motor mounts so the slanty just bolts in without changin the k frame...we'll see how it goes