I rebuilt a 3.4 liter XK engine that had been salvaged after the body was abandoned after an accident years ago. I installed 9:1 pistons when I rebuilt it 4 years ago. I have it installed in a 120 coupe and getting it ready for the spring. I am wondering what carb needles folks would recommend considering the ethanol laced fuel and the increased compression from the original. It has the original cams.