Hks Camshaft Question

[ZzZleeper]

So i've been doing quite a bit of searching for the past couple weeks and cant seem to find the answer i am looking for! Im hoping some one can help me out a little.

The RB25 i purchased came with HKS Camshafts installed. I pulled the valve covers, and the Intake side camshaft is ingraved with RB20, and the VTC has been removed. I am trying to figure out what the specs on them actually are.

From what ive gathered, HKS offered 256 Intake, and 264 Exhaust camshafts for the RB25. And they had 264 Intake, and 256/264 Exhaust camshafts for the RB20. Can anyone confirm this for me? I am guessing that the camshafts in my RB25 would be 264 Intake and 264 Exhaust camshafts. But i cant come up with a definitive answer.

If this is the case, and i do have 264 IN/EX i have also been told that it would require some head work and would need solid lifters in order for them to fit. Does anyone have any information on this? I really dont want to pull the heads completely apart right now to inspect it all for my self, as its been freshly sealed up.

If anyone has any insight on this, it would be greatly appreciated! I dont know much about this subject!

Thanks!

[GTSBoy]

Dial gauge and degree wheel needed.