emerge -DuN --with-bdeps=y sys-kernel/gentoo-sources

eselect kernel list ; eselect kernel set 2

cd /usr/src/linux ; pwd -P

uname -r ; ls /boot | grep config

cp /boot/config-3.14.14-gentoo /usr/src/linux/.config

cd /usr/src/linux ; make oldconfig

make menuconfig (optional)

make -j5

make modules_install; make install

update grub or lilo config to point to new kernel version.