this hatch i am lookin at has a ls swap in it and the guy tells me that it will rev out to 8200 would i even be makein power up there?

 

unless its really built not just bolt ons , no its not making power anywhere near there , and the ecu shouldnt let u rev that high unless its chipped , your basic ls with i/h/e makes power to around 6800 . If i were u i would look for a different car this one has been beat