Hey everybody! I was wondering if the great Honda community can help me out with a problem Ive been having. I bought a 00 EM1 civic si with a 95 gsr swap and there seems to be a problem with timing belt slack. At first I though I just needed to change out the tensioner, water pump, belts, etc. However, after replacing those parts I still seem to have excessive slack. Ive looked at many options like the endyn pulley, or the 1320 secondary tensioner but I really want to keep my power steering/AC. I know when I bought the car the block and head had been decked but the guy wasn't sure how much was shaved off. I talked to some other people and they suggested that I would need a thicker head gasket to compensate for the lost material so I started to take of the head. Currently I have the head out of the car and waiting to buy a new headgasket/ head bolts. So my main question is what thickness head gasket should I purchase? The stock head gasket thickness is around (0.30-.33) for reference. If anybody has encountered any problem similar to this please help me out! Also, if anybody has gone through this mess then please let me know if a thicker head gasket can relieve this timing belt slack. Thank you!