So..........
Got a fuel pressure gauge on at the rail, noticed it was on the low side of the range. Checked the fuel filter and it was packed full of grim and metal shavings. Took all the lines off and blew them out and now she runs like a top.
I've checked the filter and lines several times at original time of issue and all was clean. New fuel cell came straight off of a drag car and looked perfectly clean when I put it on. I guess I had overlapping issues or something... I dont get it but extremely happy its back! I should of checked it more often since all signs pointed to it...dumb!