Have an old ski boat with a chevy small block V8 engine in it. I currently have great compression in all 8 cylinders (115-135) but am not getting ignition in 1 and 3. Holley carb with the two barrels in the back and one combined on the front. Kind of a rookie but checked wiring order, spark for each and even pulled the valve cover off to see if there was a cracked spring or bent rod but everything is fine from that point. New plugs all around and after one day on the lake at 8 miles an hour the functional cylinders had some blackness but the 1 and 3 plug looked like they were fresh out the box, shiny and new. She ran great all last season but after being stored for the winter she has been a no go so far. Did not fade to this. More all of a sudden over the winter.

It seems as if I am not getting fuel to just those two cylinders. Any ideas?