i need help w/duster engine

i am not sure what to say about some comments..:munky2:

i havent read all of them...yet...just reponding to a few.for now.
this is a complete running engine..its still in my duster..
I want to change the cam....Right? already said this....lol
there is no way i can pull the motor...My father isnt even thrilled that
i want to change it... but he's not here right now...
So if i can do my home work..and get the parts all ready..
then he wont be able to say..no...
even if he did..as long as i can do it...then thats all that matters..
Now i need some help ..
Can someone explain to me why i have to take the engine apart..?
i guess if i have to ....then i have to?
is there no way i can figure this out with the engine the way i have it now?
it was running ..until i pulled the intake off....
I will go back and read more of the post's now....
Mel....