does anyone know where i can find some flow #s on the edelbrock performer rpm heads?(60889)...they have 170cc ports...thanks

http://www.carcraft.com/techarticles/116_head_chev/

Last page of the pdf file, or page 149 in their catalog.

http://www.edelbrock.com/automotive_new/misc/company/pdf/05Cat140-149(Heads2).pdf

I used those with a very mild port on the exhaust side... Very impressive head for its size.