Question fellas, ive searched and havent found a exact answer and maybe you guys can shine some light. I have a mk4 getting built with hks 272 cams, i am going with gsc s3 cams and wanted to use the same hks cams on my mk3 1jz build. Ive read "some machining" is required just dont know exactly what kind of "machining" they mean. Anyone care so share? Or has anyone done this? Not going for a record breaking build on the mk3, wanting to daily drive it at 550-600whp, enough to play with some newer cars, the mk4 im pushing it to the next level. 1400whp is the magic number on all boost plus spray. Hopefully i can have pics of project starting here soon.