I have 82 firebird wich had originally a 2.8l engine. Can anyone tell me what kind of a rear do I have?
When I do a burn out on a dry road I get one wheel spinning, but when it has been raining both of the wheels are spinning. Is this normal for a one whell spinner or do I have a broaken two wheel spinner?

 

Probably 3:42's...an open rear will spin both if equal traction is little.

 

you most likely have an open rear end, so you will spin one tire on dry surfaces, but like in water it is common to get both tires spinning few a times.

either way u need to fix what you got and make it posi, so you can spin both tires and launch better..