rtv goes on the valley side of the intake ports. dont be afraid to put a lot on there, its better to have to much than to little,u dont want any air leaks. another tip, get a brass hammer to bang out the old waterpump nipple. a regular hammer will cause the top to mushroom and you wont be able to get it out. also when you install the new pi coolant line in the valley it will exit the valley at the rear of the driverside head where as the stock line exited the valley at the rear of the passenger side head. so you will need to find a way to connect the heater core hose to the new hardline. i used a 90* elbow,some 5/16 heater hose, and hoseclamps to do it. ran it behind the mainfold and its worked fine,its been on their since march with no issues.
other than that its pretty straigforward. remove the old manifold, replace the stock coolant line with the pi stuff, bolt on the new manifold. any other specific questions just ask, i've done 2 pi intake swaps so i should be able to answer almost anything u got.
Frank