Thanks for the forum idea! I did some searching on that website, but didn't really find anything about the stock height springs. Plenty on the lowering springs. Seems like people are mixed on them, some good some bad.
I actually did send King an e-mail and was shocked that I got a response back being that I'm in the US. Here is what they said:
The KSRL-29's do raise the GT 5-10mm plus have an increase in spring rate of
15-20%. The KSRS-29's are a further 25mm higher than the KSRL-29's and I
feel would be to high
Sales and Technical Services
KING SPRINGWORKS PTY LTD"
So I ordered up the sedan springs last month from a US supplier. Don't have them yet as it takes a while to get things across the ocean. But I'll post up my thoughts when they get installed. The US supplier is: http://www.get-primitive.com/
for those who are searching in the future.