VVT 1.7 Rocker Arms Fit LX9?

[slowalero]

I really hope there isn't a thread on this somewhere because I just spent some time searching it but, I'm curious if LZ4 1.7 ratio rockers will work on the LX9. I'm aware of the offset bores found on the VVT engines and I'm not sure if GM offset the rocker like they did on the LS7 because of it's larger combustion chamber/bore. This would obviously be a cheap upgrade, and since no stone goes unturned around here, I'm betting the lack of information is due to it's incompatibility. Regardless of the aforementioned issues, I'm also curious if that ratio is too long for the canted valves. I can't even find aftermarket rockers.

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[Joseph Upson]

I'm betting the lack of information is due to it's incompatibility.

You are correct, I believe there is a difference in the pedestal along with something else I don't recall. It was covered by CNCguy in a thread on the disassembly of a 3900 he purchased.

[SappySE107]

Shorter pedestals and offset rocker arm ends, so no, they won't work.

[slowalero]

...offset rocker arm ends, so no, they won't work.

Kinda figured that since the bores are offset, everything needs to line up.

On a semi-related topic, what about the VVT timing chain guide? I was previously aware of the update/improvement, but only recently saw photos. It looks as if the mounting is identical to previous 60* engines so I wanna know if I can utilize that on the LX9 as well.