I understood what you meant for what heads went where. Just saying that's the route I took on my jimmy.
I used this one. Got no complaints. I think it was picked because it was near the limits of the max lift for the vortec heads, and had a good power band. I remember doing quite a bit of research during this part of the build as far as limitations on the heads and such. Also, before I took the heads to the machine shop, I used a die grinder to smooth out some areas in the ports and remove some shrouding, clean up the casting lines, etc. Not what you would call port and polish, but clean it up before the machining/assembly work was done.
http://67-72chevytrucks.com/vboard/s...&postcount=363
http://www.summitracing.com/parts/su...make/chevrolet