I've never done a 385, but I've done 4 or 5 390's. Most of my saws are ported similarly to one another. I like low exhaust duration for keeping torque up and excessive rpm down. I match the base gasket to the case and match cylinder to the gasket. And I try to match the cylinder and piston at bdc. While that's not entirely possible on a 390, I still try to make the skirts of the piston lineup with the cylinder extension. I also try keeping the intake duration below 160 on most Huskies. I don't know what it is about it, but they just feel better to me with a 78 degree intake opening then they do down at 85