Coolant leaking from intake bolts

I'd pull that intake because you might be getting coolant in the oil. I would also try using some FelPro 1213 intake manifold gaskets (assuming you have 340/360 ports). They are nice and thick and seal well. Don't use the end pieces, throw them out, use a thick bead of RTV there instead. What I do is clean all the surfaces with brake parts cleaner and paper towels then a put a few dabs of weather strip adhesive to hold the side gaskets in place. A very thin film of RTV around the coolant passages before putting the side pieces on won't hurt either. Let it set up a few minutes. Carefully place the intake onto the engine and note the gap on the ends. Now take it off and put a bead of RTV acrosss both ends that is thicker then the gap. Get a fresh tube and cut the applicator cap to the correct size. Note the sealing surfaces because its not straight across, especially that front passenger's side, that sweeps toward the rear when it gets close to the head. And make the RTV go up the sides slightly in the corners. Then very carefully lay the intake back on and bolt it down, cross tighten center bolts and work your way out. It would be best if you could let it sit over night if possible. You should be leak free after that.