Sixto,
I happened to stop by the forum today... and saw your questions on the E-150. I have a '96 E-150 conversion van with a 5.8L, it should be pretty similar to the '93. There were a lot of changes in '97 going to the mod motors and new front suspensions about that time. I also have a cd copy of the '96 Ford truck service manual. Be glad to make an "evaluation copy" for you if it would help.
I haven't tried in a while, but it does take some effort to turn the front wheels - even when they are in the air. The old twin I beam suspensions were build by the ton and are not very easy to turn. There is the typical adjustment nut on the steering box. I just had to replace the center link on mine ( goes from steering box to the steering linkages), the joint had some play and was contributing to a lot of wander.
Not sure on the MAP/MAF. If you have a specific question I can go look at mine. The tranny does take a lot of fluid, it has a big pan. It might be 9-12 quarts. again been a little while since I did mine, but seems like I went through most of a case of fluid.
Check out this forum for some help.
1968 - Present Full Size Vans - Ford Truck Enthusiasts Forums
Chuck