So I have been having some issues with my Ranchero 1960 with a 260 and C4 transmission conversion. It vibrates at about 1500 rpm's and wants to lurch forward when stopped at a red light, kinda like it has a radical cam. (It doesn't) I was told by a transmission guy that it's a problem with the flexplate and may have to be replaced. He also told me that it could be a 157 tooth or 164 and starters are different for each one. There is got to be a way to fix this. It also has a B&M Megashifter on it and the cable is worn out. It shifts early through the gears. I usually do most of the work on my cars, but this one is too much for me. Any Suggestions, I would like to find old school guy who is familiar with older cars and doesn't use a computer to fix them. I live in Ventura County.