If the Circle B heads are also identified inside the valve cover near #3 or
4 valve stem with the # 219015 or 219016, they will have a 30mm exhaust
valve replacing the previous 32mm. Interestingly, the 30mm spec provided
better gas flow. For those interested, a browse on the Triumph 2000 Register
website at www.t2000register.org.uk may help? Chris Witor has written
extensively on 6 cyl heads as a whole and I think some of his matewrial has
found its way on the 'Net.
There's also an interesting step by step article in replacing rear
suspension bushes by Alan Chatterton. Although based on the Triumph
2000/2500 saloon, these arms are effectively the same as on the TR so the
processes are effectively the same.
Jonmac
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