hey guys im tj im new to this scene but i have recently come across an 81 firebird my friend is selling it because it has a blown engine and dosnt want to put the time and money into it. we tried pulling it out of his barn with a truck we put it in nuetral but the rear tires still just slid across the ground does this mean the transmition is also messed up or is the engine completly locked up thank you guys for your help in advance

 

the transmission may have accumulated much rust like a skunk2 which is enough to cause that problem...

 

I think its because of engine!!!