how to remove exhaust manifold bolts aganist the fire wall on 1995 Cadillac Seville

I cannot reach the manifold bolts underneath the car.Do I have to remove the valvecover first.I'm trying to remove the heads.

Asked by for the 1995 Cadillac Seville
1 answer
I lower the cradle to get more room. hard to do at home without the necessary supports.

Roy