It's been decided for me anyway as Betaboyz are sold out of the correct ones so off to the factor's tomorrow and I'm fitting the later top rail with the pressure relief for no.4 cylinder while I'm at it provided work doesn't get in the way of progress.
Time to address the voltmeter reading low and the oil temp gauge reading high while the instruments are out as well.
I might upgrade the backlighting for the gauges with some new LED bulbs while I'm in there and stick on the 65A bosch alternator as well.
Progress, i love it!