My mates mk1 had a 2.0 that was stock internals running 40's and an ashley exhaust and 4 branch that made 140 on the rollers at the fly . Its just had a rebuild to a 2.1 with flowed head and newman cam etc so hoping for near 160 this time with a bit of luck

Bin off the 1.6 and get a 2.0 much better and get more bang for your buck with it