I have a rear sump pan on my small block and I was unable to find a pickup and tube that went straight down in the pan. The pump is a Hi Volume. I ended up using a pump cover from an old Mopar dual pickup kit and a top fuel pickup screen that I've had for years. Result is the connection from the pump to the screen is a mixture of 7/8 fittings. I was wondering if this is too large?? Seems awful big. Should I neck it down somewhere and if so to what size??