The Send/Return on the Walbro 255 lph in tank pump I recently purchased appears to have small inside diameters relative than what came stock with the kit. In the build manual on page 150, the instructions indicate both the send/return ports should be drilled to expand to 5/16".

The kit I bought has openings of 3/16 for the send and 5/32 for the return. My question is will these work as is? The ports aren't large enough to handle the 5/16" size recommended expansion in the manual.