Some info on single beehive springs.

The biggest benefit of a beehive spring is that you can use a retainer of a smaller diameter - less weight. A bugpack or berg retainer is roughly 21g... a retainer for the PSI spring is roughly 11g (the same as a full size titanium). Plus the spring itself is lighter (at the moving end) than a cylindrical spring.

The other benefit of a beehive is that the spring rate is changing as the larger coils close up and only the smaller diameter coils are active. This changing rate is also a changing natural frequency. Therefore the spring is less likely to go into a nasty harmonic and lose control of the valve.

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The springs that PSI sells are designed fit around the stock cylinder head boss without machining.

Spring # = D148X
ID top = 0.630"
ID bottom = 0.850"
OD bottom = 1.180"
117lbs @ 1.500"
250lbs @ 1.000"
$104 / 8springs

R/D spring has made a retainer specifically for this spring to use standard VW valves and locks.

http://www.psisprings.com/

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R/D spring VW kit

beehive kit that uses th OEM valves. It's only rated for a max lift of 0.520" and the valve guide boss must be turned to a diameter 0.625". It has 95 lbs seat pressure and 260 lbs at 0.500" lift. The kit cost is $360.48 and includes beehive springs, titanium top retainers and bottom spacers, $227.38 for the steel retainer kit.

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Another spring...

http://competitioncams.carshopinc.com/product_info.php/products_id/14350/26918-16

Bad bug- I haven't used them but am very interested as well. Some information from Alan Harland on Beehives:
-you need a .200" longer valve.
-installed height- 1.720 to 1.740"
-at 1.720"- 170 lbs. on the seat, 350 lbs. over the nose at .575" lift
-coil bind- 1.080"
-spring diameter- 1.2975"
- titanium retainers- 7 grams each

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You guys have it figured about right.
The springs would fit on the head ok I think
The problem is the coil bind at 1.080. Usual installed height is 1.550, so if we leave .080 from coil bind that only allows .390 lift.
If you worked with retainers and sunk the valves a little 1.600 installed height is easily possible, but that is still not enough, only .440 lift possible.

So the logical thing is to use type4 length(.200 longer) or 1/4" longer valves.

If you only plan on using .450 or less lift I know of a oval wire conical spring that binds at 1.00" even, and yields 240 lb open.
I will give you the part number if you answer me three riddles.......

sbi-160-1436