I was planning on using the 6-71 to start with because It's not costing me anything if it doesn't work out I'll buy a bigger one.
As far as heads I can't afford $1,200 a head but I have been doing alot of reading on these pro comp heads and yes i know where the casts come from and yes i would rather have american made but I'm only using the bare cast everything else installed on them will be done here in the USA.
I am considering this cam http://www.summitracing.com/parts/CCA-CL11-404-4/
with a good set of roller rockers.
this is all being done on a modest budget mostly because my wife would kill me if i go overboard. I do have a bad habit of getting carried away.