Its not that bad. Drain the water down, take out all the manifold bolts and set the manifold a side with carb and linkages still attached. Clean both surfaces and I like to use some high temp silicone sealant on the head side of the gasket and then add some across the valley and a generous amount at the corners. Re-install the intake straight down, don't move it around otherwise the gasket can move on you. Use a few bolts to keep things inline.
I don't use a torque wrench on the intake. I'm sure its a nice option but never seemed to use it there. Don't crank them down, just snug.
) I upgraded from a 2 barrel carb to a 4 barrel carb and new intake manfold. At first I used new gaskets and left out the cork gaskets that go in the front and rear and used a real heavy bead of silicone (saw it on horsepower tv) Well thats the last time I listen to them. It leaked out of the back of the intake manifold where I had left out the cork gasket and used only silicone. Took it apart. Had to buy new gaskets all together. Put that on with just a wrench, that leaked antifreeze. Took it apart and put a bead of silicone on the gasket then set it on the block and let it set up so it didn't move when the manifold was put back on. Tightened it down with a wrench and it leaked again. Took it apart and now put silicone around everything possible (both side of gasket and put it back together) I went and got my dads torque wrench and tightened it all up to 25lb in a criss cross manor middle to ends and vise versa. I went over them all about 3-4 times until they were all the same and didn't tighen any more. No problems. Learn from me! DO it right.
