On a stock 20VE is necesary put adjustable camgears when you have turbo (because the overlap), or is enougth with the stock ones

pretty much, they are cheap anyway

Nope don't really need it. From what I have seen it might depend on the exhaust manifold you use. So far it's been the logs that seem to have a problem. Talked with Jose who built a VE+T and the car doesnt hiccup with the VVL kicks in. It takes the power from 5k to the 8k red line. It was a SR16VE bumped up to SR20 with Bluebird internals. He also ran the SR16 cams.

Nope don't really need it. From what I have seen it might depend on the exhaust manifold you use. So far it's been the logs that seem to have a problem. Talked with Jose who built a VE+T and the car doesnt hiccup with the VVL kicks in. It takes the power from 5k to the 8k red line. It was a SR16VE bumped up to SR20 with Bluebird internals. He also ran the SR16 cams.

I'm thinking in a protech short manifold, is that a good choice?

Don't matter just as long as it's not a log. Note I could be wrong but this is just from what I have seen.

I am running a log mani and I have issues with cam timing and reversion. Who knows. Maybe that is my problem all along.