It's really not difficult. The hardest part is cutting the hoses to get everything to fit where it's supposed to.
Start with the intake manifold.
Disconnect the evap purge line and solenoid; you'll be cutting and splicing into the line.
Disconnect the corrugated PCV hose that connects the intake manifold to the turbo inlet. You will also be cutting this.
Using some carburator cleaner, clean the check valve area of the intake manifold through the PCV port the best you can. Use a glue dot to affix the plug to a long thin screwdriver, then mix some epoxy and spread it all over the "pin" face of the plug. Install the plug, being careful to line it up properly, and press it into place.
Now, start working on the evap purge line. Carefully cut along the line to remove it from the intake manifold fitting and the check valve already on the line. Cut two pieces of 5/16 hose about 2.25" long, and replace the evap purge line with the two pieces of hose and the small Y fitting in the kit. The intake manifold connector should be on the "single" end of the Y, and the evap purge valve should be on the "angle" part of the "double" end of the Y.
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Use the short section of 5/16 hose from the small connection on the 5/8" elbow to the check valve (arrow pointing AWAY from the elbow, towards the evap purge connection), then use the remainder of the hose to connect the check valve to the "straight" part of the "double" end of the Y fitting.
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Reinstall the evap purge line, clipping the solenoid into place and connecting it to the manifold again. Use the included hose clamp and screw to secure the check valve line to the intake manifold.
Now, carefully cut the corrugated PCV hose and remove it from both fittings. Take note which end is the intake
manifold end, and which end is the turbo end. The short section of 5/8" hose will connect the elbow to the intake manifold, and the long section will connect the elbow to the turbo inlet.
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Remember to put spring clamps on your hoses. Vise-Grip pliers are very helpful for this. I recommend "clocking" them all to face the same direction so that replacing your check valve will be easier, should it become necessary.
Allow the epoxy to cure for several hours before you put the system under any boost.