Long tubes? Drive shaft for certain with that power to be safe.
On another note - and I think some will back me up on this - set up for the street anything over 500 hp at the crank is vanity on our cars - street set ups will not put the power down and if you do manage it would be completely unsafe to do so on the street.
Having said that - different strokes - long tube headers will help up the hp and tq numbers - definitely look into an upgraded drive shaft
My .02 CDN
2014 GT Track Pack/Brembo/Recaro/Whiteline suspension system/Blowfish Racing shifter bracket - the 3.73 Torsen is so loud now that, with all due respect to Wade Chamberlain, BadFast has been renamed "The Whining Mistress"
04 1200 XLC