[Alf ista]

Well, I have tried proper penetrating fluid but no use. I tried heating the block and using a punch on the offending bolt but no use either. The damn thing is well and truly stuck. I reckon my only option now is to drill it out and possibly tap and die it. I got myself a tap and die set, but its metric. I supposed that dosent matter as long as I get the proper bolt to match it. However, I am a bit nervous about doing this, I have never used a tap and die set before. Has anyone any tips about good technique, what I should look out for and so on?