I think they are Lucas. It was whatever fiveomotorsports had listed at the time for my application. Everybody else it seems had used Bosch from them but they where showing these for it when I did mine 4-5 yrs ago.
Pressure on the fuel rail yesterday was 55 with key on fuel pump running and dropped to 50 when pump shut off. Held pressure and after a few minutes would slowly start to drop. I left gauge hooked up overnight. This morning gauge would not come off zero until I bled it and cycled key several times. Suburban is in an unheated shop and it got down in the 20's last night. This afternoon the gauge was still slow to come up and it never made it up to 50/55 psi. I didn't mess with it much today. I did put my hand on the distributor to make sure it is not loose. Back when I did all the work 4-5 yrs ago; I changed fpr(standard motor), fuel pump, plugs, wires, and distributor(accel billet distributor), lower intake gasket and valve cover gaskets. I did notice today that there seems to be a oil leak from the rear main seal area. I haven't noticed it before but my hydroboost leaks so it could have been an ongoing leak. I'm not sure what to check next and am about ready to pull out what hair I have left.