Ford: 460 no power, auto 4x4, ford 460

Question
1993 Ford 460 100,000 miles , complete tune-up ,new 02 sensor, catalyic convertor cut out, fuel & air filters new,timing at 50 degrees, Runs great at a idel but under load no power at all lots of air noise but no go , what have I missed, truck is a F250 Auto. 4x4 with 4.10 axels

Answer
Hello

With the SPOUT connector removed, ignition timing should be 10 degrees BTDC and no more.

If you still lack power, remove one oxygen sensor and install a cheap fuel pressure tester -low pressure style and start and run engine at 2000 rpm.  if you have more than 2 inches pressure, then you have a plugged exaust. otherwise, check for 18-20inches vacuum at the manifold at idle.