The evochip wont make the car run lean. An old forum user Trevxk125 had his car RR'd with the evocar's chip at G-Force and there was nothing wrong with his fuelling and was spot on, same goes for my dad's grale and the Lancia hyena that was there on the same day, fuelling was all fine for all 3 cars.
Tipo inlet cam does fit, obviously doesnt know his arse from his elbow then
Maybe point him to the Integrale forum and see that it is a cheap and well sort after mod, instead of folking out £650 for a set of C&B cams.
And finally as for the turbo seals? Never had a problem on my 2 x stock turbo's i had running a de-cat and larger bore exhaust system