I can see this 'budget build' thing is going to b something of a challenge for me.....

On the bright side, I've figured out how to make use of the 166 instrument cluster. Tacho, temp & fuel are going to 'just work' as I'll be using the matching parts of course, speedo just needs a roughly 7 pulses per turn of the wheel signal. Depending on what wheels & tyres I go for, it looks like an MX5 ABS hub will work out pretty well, just need to divide the raw ABS signal by 6 and job done.