With my suspension adjusted to manufacturers spec giving 4 inch clearance which i assume to be bottom chassis to road,the wishbones and track rod angle up towards wheel maybe 5/10 degrees.5 inch clearance makes them horizontal.Which is correct?Also anyone know how to correctly size the length of dampers and springs?

According to Gaz (Dampertech) you should set the ride height of the car with the wheels and tyres you are going to use. Next measure the centres between the shock mounts. This measurement is the centre of your shock travel.
So if for instance the shocks are available with 3" travel and your measurement is 10.5" then the shock length should be 12" extended, 9" compressed.

Hope this helps.

David