To some of you, I may be in the wrong place. I have checked out several ford truck and other groups that talk about the F53 and I have found this one to be the most helpful. I don't have a motorhome but I am using and F53 chassis to build a truck. The chassis is from a 1999 Damon Intruder that was totaled in an accident. All of the RV stuff has been salvaged and we were left with a chassis that was not damaged in any way. I am in the process of fitting sheetmetal from a 1936 Dodge 1-1/2 truck onto the F53. Guess that it will be a big street rod. Now for the original question. The big gas tank from the Damon will not fit the new configuration. I have a selection of truck fuel tanks but I will probably have to use an external fuel pump. What is the fuel pressure required for the V10?