103's and a 160 are too cold. It's not like the old days were cooler is better, today's cars prefer temps above 180.

Go with a 180 and 104's or 605's Auto lite plugs.

3.2 might be at the max of the injectors, with a canned tune more than likely they will be. It will run it rich to save the motor really.

Hopefully you bought a wideband and some sort of scangauge to monitor these things aswell.