[89LXCarb]

I've got problems!! My 79 granada is serving as my daily driver while I'm building up an 89 mustang. Well the 250 6cyl has major problems. When I was checking my oil I noticed it was white!!! That means cracked head right? Well it looks like the mustang is gonna sit for a while and my 302 is gonna go in the granada. I just bought a turbo coupe rearend and I was wondering if anyone knows if it'll fit in the granada without major modification. I've heard it fits great into a fox body stang, and I can't have it down for very long at all. I really don't want to have an expensive rearend just sitting around collecting rust.
Any suggestions or comments would be appreciated.
I need help bad