2.0l pinto isnt that much quicker so i wouldnt even bother with that, ive wasted loads on trying 1.6 head on a 2.0l bottom end to increase the compression with a fast road cam and 45 carbs etc and still the power is crap and not worth the money spent, if i was you id leave the 1.6 pinto how it is or just wack on some twin 45 carbs, but they really arent worth wasting the money on in my opinion, if i went back now to when i first had the 1.6 pinto back in my sierra and knew all what ive done so far id would have just put a scorpio 2.3l engine or a rs2000 engine in my sierra as they have a good bit of torque and a nice amount of power