dist. doesn't fit

I think Demon Seed hit it right on the head! MEASURE MEASURE MEASURE to see where the difference is.If one fits you would think the other would also! But sometimes it is so small you can't see it with the naked eye.Just 5 or 10 thousandths could be the problem. Something as minor as removing a small burr or something requiring a little machining work.I would bet it is found when measuring,be sure to measure diameter,lengths of each,and anywhere else you can get a measurement. REMEMBER NEVER FORCE ANYTHING! A BIGGER HAMMER IS NOT THE ANSWER! It should just slip right in pretty easily!And remember we are talking about a distributor ! LOL