I’ve got a couple of heads here one from a 91 JDM Astina GT the other from a 96 laser tx3i. I want to use one of the heads on a BP26 GTX factory turbo block I have. Are all BP05 heads the same? The astina one the castings are much nicer that’s why I ask. Also I have a BP22 inlet cam from what google tells me there good but can’t find any real info? Also all the earlier cams are hollow weighing 400g less than the ones from the 96 head I would assume they would be better for performance.