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Message: [QUOTE="oldbluef250, post: 68076, member: 493"] Alright I'll tell you all the mods I did when I had the motor out. When I did the swap, I put in a forged rod motor, rpm-incs old motor that was in his van. Exhaust ported heads, comp 910 springs, smith bros push rods, H-11 head studs, 350/200 hybrid injectors that were gone through by casserly before they were sent to me, srp1, ih bellowed up pipes, 38r and s475. I am just running the 38r for now, the other turbo will get mounted in the next couple of weeks. For the fuel system I have a tsd sump. From there it has 5/8" line to the filters and fuel lab pump, form there it has 1/2" line to the block, from there it has #10 braided line up to the valley. Once it gets to the valley, it T's off to size 6 braided line to the back of each head. When it comes out of the heads up front, there is 3/8" line going into the regulator on each side. I used the stock 5/16 return line going back to the tank. The return line may be my issue. I know I have read that you should use 3/8" line going back to the tank, but I didnt think that 1/16" difference in the line would make that big of a difference. Also for the fuel pressure, it doesnt necessarily go up. I think it just went up before because I turned the regulator up once I saw that the fuel pressure went down. It seems that once I take if for a drive after it has sat for a while and it gets back at 65 psi , fuel pressure will slowly drop until the truck just runs like crap. I dont think that fuel is coming out of the back of the heads. Like I said, I THOUGHT that it was fuel. After the truck sat over night, I realized that my heater lines were leaking where they go into the firewall. Idk how I could mix up fuel and coolant, but its possible coolant could have dripped onto the manifold I should also mention that the pump is in "reduced" mode. [/QUOTE]