974 Casting sb heads 2.02/1.60 ss valves, 3 angle job, bronze guides

Need to sell these 974 casting small block cast iron heads to purchase some aluminum ones. They were recently rebuilt with 2.02/1.60 stainless steel valves and had a 3 angle valve job done. Bronze valve guides installed and 67cc chambers. New Isky .575 dual valve springs installed. Used these heads with the ductile iron 273 rocker arms and Mopar 557 solid cam for maybe 100 miles. Asking $550 plus shipping/paypal. Can get pics to your email.