Louis is the valve spring issue that you get valve float or they are actually breaking? So whats the answer with the valves - one piece sodium filled or something like that?
I ask because I'm starting to think I'll take the head off my old motor and get that sorted in the back ground as a moderately ported small port. Once that's done down the track I'll do a bottom end in car refresh ( hone, rods, baffled sump, new oil pump) and wack the good head on. I'd love to do an 83mm over bore and square the motor up a little. It weighs so much for just 1780cc that its seems silly to not add capacity but that needs pistons/$$$.