If you have replaced all of that, it is probably your Distributor Pickup Coil. Those were common problems on Fords. I had to replace mine, too. It is the round coil that is at the base of the distributor shaft inside the distributor. You have to take the distributor out and disassemble it to replace. If you are not a mechanic, you might want to take it somewhere, as this is not a job for the un-mechanically inclined. (Not slamming your abilities). Keep us posted.