Best flowing big block heads?

If any one needs heads in Canada,Ontario,Quebec,or the upper north east,I have some 30sets of small block and mostly big block heads,426 hemi heads and old hemi heads from the 40 and 50s,.
Heads are only as good as the cam being used to work the heads.Its of no use to buy a head that goes to .700 lift if you install a cam of only .500 and never intend to go to 7000rpm,you wasted 2-3 grand.The other factor is the cylinder feeding the port,to big a port for a small bore,your screwed.You have screwed your self out of 20-30% of the power of that head.Most of the heads out there are for big motors with big cams,so chose your heads with real world applacation,mrmopartech