Help.....Please!!!!!!!

[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

[Rev]

Sounds like water in the oil, but could just be a blown head gasket. What does it run like?

Rev

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'66 Coupe, 306, windage
tray, TRW flat tops, 351W
heads,pocket ported, 268
CC hydraulic cam, R tip
R's, Edelbrock Performer,
600 CFM Holley vac. secs.,
Mallory Unilite, coil, fuel
pump, Tri-Y headers, 2 1/2 "
custom pipes, 3 chamber
Flows, stock C-4, 3.25
Currie built 8" rear
and whatever else I
forgot. 14.17 e.t., 97 mph
1/4 mi.

[Rev]

Also, any hard freezes without enough anti freeze? Even with freeze plugs, this can crack blocks. I know, I've done this, though I hate to admit it.

Rev

------------------
'66 Coupe, 306, windage
tray, TRW flat tops, 351W
heads,pocket ported, 268
CC hydraulic cam, R tip
R's, Edelbrock Performer,
600 CFM Holley vac. secs.,
Mallory Unilite, coil, fuel
pump, Tri-Y headers, 2 1/2 "
custom pipes, 3 chamber
Flows, stock C-4, 3.25
Currie built 8" rear
and whatever else I
forgot. 14.17 e.t., 97 mph
1/4 mi.

[89LXCarb]

Well the car sat for about 2 weeks without being started. It was a little low, but not that bad. Now I guess I can get a V-8 for it. I've already got a 351 windsor lined up. It's out of an LTD.