Thanks again all! Graham's comment well noted re ally chassis vs. trad. It looks like a consensus on 25psi and I adjusted to that earlier today. I was going to take a run out to see how it felt but logsplitting duties prevailed - felt suitably manly in the cold winds of Cambridgeshire with an axe and chainsaw.
Kev, Thanks for the comments. These are my sort of Morgans and I would love to have kept them but that was never an option for various reasons - especially budget!
I'll post a picture of the Speedster as soon as I work out how to do it however the car is still on the Morgan used car locator at Krazy Horse (marked sold). Its the blue one with white rondels etc - bit of a P4SS and ARP4 conenction in my mind. These are the sort of Morgan's I love.
Thanks again for all the useful comments. Great forum!