Sorry to hear that your still vibrating. I actually just finished up yesterday. So I'm finally done. No vibrating at any speed and I mean I cruised it for over 10 miles at 75 to 85 mph on Rt 75 in FL last night. It was bad ass. With the 323 I was running 2K at 80 with the torque converter locked up. This ride flies. No vibration anywhere at the lower speeds eather. I'm gonna start a class on this in September if anyone would be interested in attending. It will be titled "The Proper DynaFlow to 700R4 Transplant". No actually what I found is that all of the problems I experienced were from bad parts. I purchased all of the conversion parts from a gentleman from up near Tinton Falls FL. He had them installed in a 63 and he said he hated it and was ripping it all out to convert back to the DynaFlow. At the time I didn't understand why he would give up, but now I do. I just went through a year of hell because of those parts. I saved about $800.00 and drove myself nuts. First off was the Bellhousing adaptor. It had a hairline crack in it at the top of the 2:00 bolt hole, so I had the same area on on each side reinforced by a aluminum welder in Cape Coral. He platted both sides inner and outer. That my friend will never crack again and I strongly recommend and considering doing this swap does this reinforcement before the install. Next problem was the flywheel. The one I got as part of the conversion parts had a washed welded on it. My partner in crime Gene said Joe don't use that flywheel someone messed with it and I said Gene it came off a 401 nailhead my 425 is the same exact thing. It must have been balanced with the washer because of the conversion kit. Well I used it, Gene was right, I was wrong. When I started the car I thought the rearview mirror was gonna fly off and hit me in the head for being so stupid. So I ended up buying a brand new flywheel from Bendtsen being they produced the original kit. That was the end of that problem. Next up the infamous driveshaft. At this point I would like to recommend that anyone thinking about this conversion go with a 200 R instead of the 700R. The main reason is the dimensions of the transmission. The 200 R is not as long therefore you don't have to wack off as much of the front shaft as the you do with the 700r. This in itself allows for a much shallower operating angle of the trans universal which becomes more important as we progress. So one of the problems of the driveshaft was balancing but much more important for me was the phasing of the shaft. Do to the fact that the driveshaft I purchased as part of the used parts package was phased at zero degrees there was a vibration. But who knew. My major problem was that I knew nothing about phasing and every one of the 4 driveshaft shops I went to all insisted all driveshafts are phased at zero degrees. So now I know nothing about phasing driveshafts and through suggestions and the fact that the carrier bearing that I purchased as part of the drive shaft in the kit was a inch and a quarter shorter I moved to changing the angle of the rear end, carrier bearing and trans mount. This was the beginning of the end for me. At one point the vibration was so bad the dashboard was shaken. The best I could get it was a vibration either between 20 and 25 MPH with the lower carries bearing (64 & 65) or between 40 and 45 with the taller bearing (63). I swear I was at the point where I bought a fresh bottle of Jack Daniels and a new box of Wilkinsons and I was heading for the bathtub. Then someone told me about the shop manual and drive shaft phasing. I also had to learn the concept of how a universal joint actually functions. I explained what I was trying to accomplish to a tech at Spicer and he told me to throw out the shop manual because due to the change in trans length and carrier bearing height nothing was going to work as described in the manual anyway. Well anything but the phasing. He told me the main thing was that no working angle should be more then 3 degrees and that no opposing u-joint should be more the 1/2 degree in drifference. This deal is a course by itself. But I learned it all, I now understand it all, and I understand how to figure the working angles and to be able to get it into the proper operating spects. It all works great but guess what? I still had the vibration but much less severe. On to phasing. Now I know my flywheel is good, my drive line angles are ALL CORRECT all I have left at this point was the phasing. I went back to a shop that worked on the shaft before. I'm not gonna mention the name of the shop but it's not good. First off they didn't want to phase it to 101 degrees they said I was nuts. So I showed them the shop manual and they reluctantly agreed to do it. After I installed it was much better but no quite perfect. I pulled it out and checked the phasing myself with a digital gage which I now own because of setting up all the drive line angles. Turns out he was off by 3 degrees. I brought it back to him and he went nuts and threw me out of the shop and said I was wasting his time. Said even if that was the problem 3 degrees wouldn't matter. So off I go to another shop in another town. This shop "Specialty Parts" of Charlotte Harbor FL. set it at a perfect 101 degrees rebalanced it and brother I'm done. I have never lived through any type of Sh&t like this in my life. This has been going on for over year. This was one of the biggest PITA I have ever dealt with and I'm so glad it's over. What I will say at this point is that it's a different car. It's so much more fun to drive. The 700 R has a super low 1st gear and a real tall OD. This thing really rips and 70 mph is 18 to 19 hundreds RPM's. Can't wait to check the highway MPG. My next project is to go from the 323's to a set of 356's. What problems will I manage to create during this change. Stay tuned for upcoming disasters. Stay warm my friends. If anyone would like to discuss any parts of this feel free to give me a call. Best to everyone always and thank you to everyone that helped with information and basic knowledge of these cars. I could have never ever accomplished this with out this site. Thank you all again!!!!!!