My engine goodies arrived yesterday- big thanks to Andy
As expected the new valve is different.
Head & stem diameters are right but it’s around 50gms lighter and .05” longer.
Also the spring retainer sits lower on the stem so the spring will be .08” more compressed when closed.
I’ll assemble a head with this lot and see how the rocker sits and whether the spring will still have enough clearance between the coils.
If it doesn’t all sit right I’ll either have to search again for another valve, or get 8 of these and have my mate grind the stem down by .05”
If the spring binds I’ll have to find a different shaped set of spring retainers
Bugger!
No-one will believe you...