head id please

[ZL1.FUN]

does any one know about sbc head casting number 3703528 like what valve size they cam with what car or truck ect any help would be great thanks http://www.yenko.net/ubbthreads/images/graemlins/confused.gif

[budnate]

save this link, http://www.mortec.com/castnum.htm

those are probably 523 heads.