Thanks Sam, I was pretty sure it was a 410 axle, but it could well be a 411. I'll do a little more research. Hard to tell, and I'm not sure there's any differences. I don't really want to swap it out but the ratios aren't great on the 406 axle.
Edit...digging around the forum Clyde referred to this:
"I also forgot to say that it now has a later 410 V8 back
axle (running a 3.06:1 LSD) and larger Girling brakes to compliment
the 4-pot after-market front callipers. This was installed so that it
would have around 30mph per 1000rpm in 5th gear whilst haveing the
strength to handle 300+ lbsft of torque and the advantage of the LSD
for handling and cornering. Bristol quoted me a new axle (like a
Blenheim - same as the used one I have) at £5k plus braking and wheel
hubs - say £7k. I bought the used axle for £450 - collected myself
with help from Sam Frost and then had it fully rebuilt by Dana Spicer
in Birmingham for £750" Which is what I remembered. Somewhere along the line the hubs, discs and brakes have gone awol. Which is a pita.
