Which turbo for a 500hp 273?

273 said
I'm not against making 500hp at the wheel especially at 7 psi, the 273 in N/A form probably be will be making 250-300hp at the crank

273,

http://www.squirrelpf.com/turbocalc/index.php

Enjoy!

oh!, (my manners sometimes) prine , perhaps you should visit the site also...
just to crunch numbers of course...

:D