Ok now a straight answer

Fronts fine for track (depending on what profile tyres you run) but too hard for road.

Backs way too hard for road use. Try dropping them to around 220 and see how they perform with the damping rate range you have.

Now I have told you that you will go out and drive on them and say to yourself "I think they are too hard", when all you have done is taken on board what someone else has said and not come to the conclusion yourself.

Sorry for being flipant - I did understand the question and did have an answer to give as an input, but I'd rather you went out and tried them first and maybe then come back asking for input.

As for springs measure the length now before you fit them, then fit them and get them set up on the car. Then if you need to adjust the length later to get a better rate you can easily say if you need them longer or shorter as well as softer

Any decent motorsport stockist will stock/sell them. Demon Tweeks have a good range and carry good stocks, not always the best on price but its a start.