Hello I am wonder which would make more power by just bolting on. I have milled the 461's down to about 58cc. They are both stock valve size and non ported. Has anyone tried thses 2 heads to see which made more power. Thanks Grant

 

im not familiar withthe 083 but the 461 is one of the best flowing factory chevy heads ever made the 461x casting is a 2.02 1.6 valve vette head, but the 461 would be common to a 375 horse 327 or something of that nature. the runner volume on the intake side is around 183cc and the exhaust i around 76cc hope this helps! they will hold here own against the s/r torquer by world products.