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Single valve springs Vs. Dual Valve springs

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well right now im gonna stick with stock cams but later down the road ill end up with hks 272/272
 
You'll be fine running the stock springs with the hks 272's. Although it never hurts to have stiffer spring pressure. Especially when the head will already be apart.
 
I would personally go ahead and change the springs while the head is apart. Although it is not necessarily needed for the hks 272s but if you ever decided to change to a set of kelford 272s then you will need either dual valve springs or beehive springs due to the aggressive nature of the cams that kelford produces.
 
Due to how many wore out springs springs I see. A new set of single springs would be a good idea.

How many miles are on the head? How old are the springs?

I like the BC1100 with stock retainers, they are an affordable sping.

But whatever sping you go with, make sure it is installed properly.

http://www.dsmtuners.com/forums/cylinder-head-short-block/420045-how-have-4g63-head-rebuilt.html

http://www.dsmtuners.com/forums/newbie-forum/341209-4g63t-valve-spring-info.html

http://www.dsmtuners.com/forums/newbie-forum/341287-how-test-valve-springs.html

http://www.dsmtuners.com/forums/newbie-forum/341028-4g63t-head-oil-port-mod.html

Hope this info helps!!
 
i was told the head was fairly new but there are some compression issues so im pulling it anyway to have it machined so i though i mine as well do some upgrades while im in there
 
The stock springs get to close to coilbind with +.050" bases with hks 272 but the BC's there's a soild .100"+ clearance. Seat pressure is around 85# with the + .050"s
 
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