I have a warm 1150 motor running a worked 202 head and Camtech 619. It currently has single valve springs and the seat pressures are apparently a bit on the low side. I ordered a set of VSP580P valve springs, but instead was supplied a set of Minispares C-AEA525 springs.

Can anyone advise the difference in poundage, coil bind height between the two springs? I think the head has valve stems long enough to allow use of the AEA-525 springs, and the springs look pretty good, but I am a bit wary that the seat pressure could end up too high if I can't get the fitted height as recommended.