NOT KNOWN DETAILS ABOUT NISSAN SKYLINE RB26 ENGINE

I purchased my MRS 3sgte again in 2020. Parker from NW Motor s identified as me and told me I was acquiring a just one-of-a-sort, clear 3sgte motor. and he didn’t lie. I’ve got the pics to verify it in advance of set up. I have never observed a motor this clear. Seems like it just came off the assembly line.k20a2/ k20a3 blocks Is there any majo