Porting GT-40P Upper and Lower with a Dremel

[Coupe5oh]

You may try and find my old post, some info there, im going to match my stock upper, to a bigger tb, and clean up the upper ports, i have some grinding stones, and abrasive rolls, like sandpaper rolls to do the final cleanup, i was told not to shape the port into a "bell shape"....let me know how it goes, i have my 65mm tb sitting here, just waiting for it to cool donw before i go yank the upper, or i might shove a towel in the upper, and do it on the motor.

good luck...