Although removing an intake is a no brainer, installing one correctly is not. Use sealer in the corners where the gaskets meet, I also use a small amount around the coolant ports as well. Also with a small block ( 289/302) it also helps to use four long carb studs screwed into four of the intake bolt holes in the heads to help guide the intake into place, then remove them after getting the other bolts started. As for torquing the bolts, use a torque wrench, start with the middle bolts, and work outward, in a criss-cross fashion and do not torque it more than 20 ft/lbs. Many times 15-18 is plenty. Torque all the bolts 5-6 times till the intake settles. As for the end gaskets, some swear by them ( like me) and some do with just silicone sealer. I only use just sealer if the end gaps are too small for the gaskets.