I am in the process of swapping a 5.0L out of and 86 mustang into my 66 and I have a couple of questions. I went to mount my original timing 298 timing cover today and noticed that the 5.0L block has two dowels at the lower wings where my timing cover has two bolt holes? DO I need to just drill out the bolt holes to fit the larger dowels or how is this typically handled? I also noticed that my original distributor (pertronix) is a little bit shorter than the distributor I removed the 87 engine. It seems to still engage the oil pump driveshaft and turn it but is this a problem also? I am trying to stick with a carb setup so I was really hoping to used my pertronix distributor. Thanks for your help.