when i was swapping the the stock heads off my 85 cougar for a set of 64' 289 heads i just soaked the bolts with a little wd40 and tranny fluid let it sit over night and they came right out
my 85 cougar always ran a little warm on the gauge and one day it got really hot on the interstate and I had to pull it home. I took the radiator in and had it flushed the thing was probly 10-20lbs lighter when I got it back and the guy told my that the t-bird and cougars need to be flushed every 80k to keep them flowing well. Ran cool ever since
