Gm, been running into all sorts of dumb problems and this is the latest. i went to mate the trans to block and it wouldnt get flush, pulled out some sanding paper and sanded the dowel hole on trand and the dowel pins, then i used a digital caliper and found that the dowel pins (engine) are .6215 and the dowel pin holes (trans)are .6115 . I called a few places, trans builder, engine builder even jegs. apparently no ones ever seen this. i cannot get a smaller dowel or it wont fit the block so what i am planning on doing is reaming the hole with a 5/8 ream (closest to what the dowel should be (.6250) my question is this. If the dowel doesnt fit super snug, is that an issue? i dont think itll have a ton of play but it may not be too snug.