I also have big lift cam. I'm pretty sure I've discussed it with you on Facebook, my real name is Reynald.The valves almost clear with the 8.6mm lift. My motor would probably be non interference if I didn't take soo much off the head. Not a big deal. I've got the 5m oil pump gear and gates tbelt.
I have TRD cams with 10.8 lift you are right. I don't matter interference, European cars are, and I know timing belt is importantWe talked about single vs dual springs i think but not about cams. You have the TRD cams with 10.x lift right? Unless u get custom pistons with some deep valve pockets it will definitely be interference. It's not a big deal really. Most race motors are Interference.
No idea what year the 5m gear I have it is. From what I've seen in the epc for the 5m motor there's only one variation of the gear.
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They were straight -6 followed by some 90s to a Can, then to the turbo intake. not sure how they ever got stripped. I guess I could try tapping them for -8 and the oring trick. but I feel like I wont get away from the issue unless I just make it permanent. I hate redoing things over and over again. I like overkillAre your fittings npt? Im using -8 oring straight fittings for my valve covers. I have 4 threads or so but with the oring I just need to snug them. I think the oring or npt fittings just look cleaner than welded.