no they should make more then that…more in the 340-350whp area.
They are a IRS tho so the drivetrain loss is greater on vettes opposed to straight axle f-bodys.
look at it this way…
my car put down 351rwhp/355rwtq with a lousy LS1 (rated at 335hp) with just long tubes and a shitty Y pipe through the stock catback and stock intake…On Morgans dyno.