I just installed hyd assist, which works great until the truck gets warm... then it works somewhat. The setup I bought was for an older truck (inverted flare lines, got it off another forum) so I swapped pumps when I did the swap. Silent operation and good power until the fluid gets warm, then the power drops and it whines at any RPM over 2000ish. Do I need to try to bleed it some more? Or did I get a bad pump? It seems like it would whine all the time if it was a bleeding issue, cold or not. Also I bought a pump for a 78 to put on my 86. 78 shows 2 pumps (one with one stud hole, one with 2 stud holes). My 86 has only one stud, the local parts houses don't stock the one hole pump like I got 200 miles away so would it hurt anything to just stick a bolt in the extra hole in the one that they do have when I trade this one out?