So now with one fuel pump replaced the car runs fine again..the other ordered..And then to follow up after getting both new pumps installed and running a tank of gas Im getting 29 MPG in town which is awesome..Fresh cylinder head rebuild and lots of tune up work but its looking like the perfrmance I hoped for!

As a note, the car runs fine on one pump but Im assuming my fluctuations in mileage were due to fuel pump issues and that two good new pumps are primarily responsible for this great mileage Im now seeing..That is if its consistent now repeatedly..

No other noticable problems running with only one pump, acceleration and top speed just fine..but possibly the low pressure provided weak atomization at the injectors..