If you use ARP moly lube or anti-seize, 23lbs is pretty stout. I have to call BS on being able to hand tighten to 23lbs
. Get a good torque wrench. I just installed my intake at 20lbs with my new electronic Craftsman 3/8 10-120lbs wrench and was shocked how stout 20lbs was. Keep in mind too that you are tightening a small bolt into aluminum so do not want to strip them.