top...seen them install on left side of driver, them speakers on both sides up toward front, seen mounted under the driver pit, but no room, and big bounce, yuor knees will feel it...the motor, take a compression gauge and check the readings, 150psi is perfect. See if oil injection is still hooked, if not, you'll need to premix, ask to see bottle of oil for the resivoirs, dont wanna mix minerals/synthetics, if at all, take to the lake....good luck