unfortunalty i don't have the original heads. i will double check the numbers. thanks for the replies. it has the double hump casting on the ends. where would i find the numbers your looking for??? i posted the numbers that i saw on top of the heads. here they are as they appear on the tops of the heads
3782461 and to the right is "gm" and on the far right hand is a
a295 5 clock

on the bottom lefthand side of both is
461
on the rightthand side on the bottom is 03(or perhaps c3) and on the other head is 2
the only bolt holes on the ends are under the valve cover.