Which ones? i would dare to say there have been more 3.875" SE head types than any other performance part installed on a TC motor.

HTCC, HTCC D Port, CNC, 103+, 110+, Cast as CNC, Pro TC, Performance, ACR performance, MCR Performance, Kompressor, MVA CNC, CNC ported STD casting, i'm sure there are more if i looked.

Some of the earlier ones you can not get matching pistons for any more. Always keep the kit number that your heads came in, it makes life a whole lot easier when it comes to parts, as although some were very similar they had different combos of valves, valve lengths and springs.

Cheers.