Small block TrickFlow heads part 1

I have used the BB TF heads. Yes, not cheap but looked well made & worth the money. Some springs reqd varying shim thicknesses to get each of the installed heights equal. That is how they came, another indicator of manual involvement & checking. Both heads were a PERFECT fit on the cyl block dowels, indicating great QC. Many other brands I have used are not a perfect fit on the dowels...which makes you wonder how accurate the rest of the machining is...