P12 swap wound up being cheaper than doing a P11. Comes with the CAS so you don't have to buy that or do hall effect and then I sold the cams out of it for more than I could have gotten for P11 cams. Winds up being even more cost effective over a P11 if you want to stay with the P12 cams unlike the N1s I switched to.
Then I used Manley DET single springs and valve seals from a GA16DE. It was cheap.
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