Valve spring questions

Gents I am looking for some info.
First I think I have narrowed the cam I want to get, to the one below.
Cam http://www.lunatipower.com/CamSpecCa...umber=504a2lun

Springs http://www.summitracing.com/parts/LUN-73949/

So the questions I have are:

1. Will the recomended valve springs work on my 302 heads without machine work?

2. Will the valve spring retainer hit the valve seal?

3. Can you change the valve springs with the heads on?

Thanks fellas
Author: admin