I don't see why not. Do you have it in you possesion? If so then make a template on paper of the upper and see if it matches to the lower, bolts and all.
thats possible. I have not looked at one so I don't know.
Boss351 do you have the intakes in your possesion? If not ask whoever you might buy it from if the 351 has inline or staggered ports. the 5.0L stock piece has inline ports.