20% more duration

DAMN!
The SVT intake cams have 3.2% (8 degrees) more duration then stock.
Do you mean 20 degrees more? (20% is ~50 degrees longer duration!)
Just under 10mm of lift would be stock lift. (9.8mm) That makes sense on a DOHC engine. Massive lift is not necessary.
I completely agree with you on the IMRC. I couldn't love them more pinned (removed) if I tried. Widens the powerband and makes better power right off shifting. Not to mention the instantaneous throttle response.