ranchodenieve

I recently acquired a 1973 450 SEL that had been sitting by the road for 9 years with a bad fuel pump and leaky non fuel injection hoses. These were fixed and now it starts. It runs well and revs properly when cold, but quits running well once it warms up with driving. It won't rev about 2K and has no power. Any application of throttle will cause it to bog. In some ways it feels like it is not getting fuel. It has electronic fuel injection.

Any ideas as to the cause of this problem