If your looking for big gains and going the turbo route, I would save up that $1000 till you get enough to do a full rebuild with new gaskets, new timing kit, and forged pistons rods. Then save up another $4k and go turbo.
If your just looking for quick small gains, I would just go with an intake, pulley, electric fans, and exhaust. But be warned that like everyone else, those small gains will only keep you satisfied for a while.
