I am in the process of building a 3.9 to put into my 1988 Range Rover to replace the very tired 3.5. I was lucky with the 3.9 it only needs standard size bearings and rings to put it back together. For the camshaft, I did a lot of reading and looking at different profiles and decided to use a standard ERR5924. For all round performance this seemed the best choice. Other manufacturers claim to offer more HP or torque from their grinds but at the expense of low down torque or HP at higher revs. At least with the ERR5924 I know what I am getting.

In the next week or so I will be installing the camshaft and would like to dial it in to make sure its timed correctly. Does anyone know the figure for Lift at TDC for no.1 intake valve, or any other figure I can use to check the timing?

I'm Pretty sure you don't time your cam to TDC. You need to have the cam specification.

According to the workshop manual:

Inlet opens 32 deg. BTDC ; Closes 73 deg. ABDC Duration 285 deg. Valve peak 104 deg. ATDC

Exhaust opens 70 deg. BBDC ; Closes 35 deg. ATDC Duration 285 deg. Valve peak 114 deg. BTDC

I replaced the camshaft in mine a little while ago and used a Kent H180, the engine is a little more lively and there was a small improvement in power and dare I say the word "economy".

Do a search, I posted a thread when I swapped my cam, you might find some of it useful; if I can remember where it is I'll pop up a link.

HTH

Have a breeze through this one:

https://www.landyzone.co.uk/land-rover/time-for-surgery.296902/