[dynomatt]

Bazza,

FWIW, the advice I got (from a guy who worked with Cosworth motors for many years) is you'll be wanting to chase the lift...I can't remember exactly but stock coil bind is around 9mm...even with different grade springs, you might be able to get that higher but to what end?

Solid buckets, shim under (not over) is really the way to go I think for reliable high revs. I realise people have had hydraulic buckets higher but is it worth it when valvetrain weight starts to become a factor.

Interesting on the drag motor...glad you dug that up. 310 duration is decent...must have idled like a ***** and had a very narrow peak curve.

The other thing worth considering is if you're doing a turbo build...a lot of the cam theory goes out the window in my experience.

M