REPLACE VALVE SPRINGS OR NOT??

[V8JOHN71]

I would appreciate your thoughts – I am rebuilding the cylinder heads on a 3.5 v8, carb version, from a Discovery 1, which has 75,000 miles on the clock which I believe to be genuine. I am going to re-grind the valves which all look good and no play in the valve guides. Question - is it necessary to replace the valve springs? Springs themselves look fine and tappets are good with minimal wear, very minor rub marks where they have sat on the cams.
Whilst asking, the official Land Rover workshop manual says nothing about replacing the head bolts so I assume they are ok to reuse?

All comments are much appreciated!

[Clyde Archibald]

If its the old style head bolts they can be reused several times like arp bolts, but if your engine is a 10 bolt head then they are stretch bolts and need changed every time you undo them. Your year of Disco could be on a changeover period so you need to check which bolts you have..
I would not change springs if they are standard and giving good cam wear and motor runs well, you only need to replace if putting in a modified camshaft, lifters to suit higher anticipated rev range.
Good luck
Chris