Lowering my Capri Mk 1

This kind of ties in with my question about what the hub to guard height is as standard.
 
I put kings kffl 13 in my v6, which are meant to be a 1in drop.  Hub to guard is 330mm but the top 4 coils are closed meaning the soft end of the progression is doing nothing and the ride is harsh.   Wilkinsons say that is normal, kings web site says the opposite.  Kings ignored my email asking for more tech info.
 
So I fitted Burtons cs118.  They are also meant to be 1 in lower but they sit at 370mm hub to guard, 40mm higher than the kings, so one of them has got the ride height wrong.  The rate is 145 which is nice, but they are too high.  I think  the kings are a touch too low for decent guard clearance.  I will probably try another set of Burtons and dump the kings onto ebay.  From what the guys at Burtons have said the next size down will be spot on for height and ride at 145 lb/in is nice.  Tech support from Burtons has been 1st class and they are cheaper even with freight.
 
I tested 2 other sets of springs but they have measured rates of 110 lb/in so I dont know what they are from.
 
So my 2c forget kings, they wont want to help, talk to the guys at Burtons.  I have a lot of data and now have a spread sheet that calculates ride height quite well, but need to take a few more measurements yet. 
 
Is yours 4cyl or 6?
 
What is your starting hub to guard height?
 
Also when you drop the car back down, push it back about 1m then push it back forward.  This is because it lowers on an angle so you need to rotate the wheel to get it to sit right.  Then take your measurements.

When changing the springs...yes you need to roll the car a bit to let the wheels work there way out to the 'settled' position. I have the Kings lowered springs in my V6, firm but not too bad.  Remember to put the large wire gap at the bottom !!! (as per instructions - progressive springs)
 
Re Burtons 1st class service, I had the exact opposite.
Wanted a reverse switch for a Ford Type 5 box, confirmed with them it was the correct one before ordering, and on trial fitment it just fell out of the hole.  Supplied item (with 14mm thread) is nothing like the larger diam size, coarser thread and longer pin needed - just plain wrong (found one on eBay eventually).  Emails requesting discussion of problem were ignored.  B seems to be hit and miss....

I've used Lovells springs in the past (1" lowered) and they worked quite well. I'm not sure they're still around anymore, but they might be another option.

Re: Burtons experience, mine was similar. They don't want to know about any problems, and they won't respond to emails if you have one.

I bought lovells for my MK1 escort, same experience. If anything they raised the car so I got a refund on them. Then had the original coils reset 50mm. I wouldn't advise this if you have expensive inserts!

I know what you are saying re measuring from hub to arch. I have had a reply from Clive and inc shipping are £95.00 so 145 lb springs are now on the way to replace the Kings. Clive reckons they have given springs to suit a 3 litre V6 rather than my featherweight 1600. Thanks for the input guys I will update when I fit the new ones.

What price?  I need a set

On Feebay as of today.