Here are links to a couple of sound clips of a iron headed drag race Y engine making in excess of 500 HP through the mufflers.  Turn up your speakers and enjoy.  You might want to pull your feet back away from the speakers though.

500+ Horsepower dyno pull 1

500+ Horsepower dyno pull 3

You got that right Billy!  Although if I could just get 350 hp that record could be ours with ease.

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias