Called a salvage yard.

Mike
Get a gallon of PB Blaster and toss the liquid wrench. You will be glad you did. Exhaust manifolds are all the same 1 or 2 BBL.
Frank

Thanks 66acuda, My son is bringing me some today from his shop.
I just happend to be on the phone yesterday with him and ask him what PB blaster is!! I quess they use it too, Thanks.