Location issue for resonators

How about 1/4 or 1/8 wave resonators to fit the space you have between the collectors and mufflers? Using a 1.5" 180 mandrel bend cut in half (for two J bends) and straight header pipe to cap at the ends. Add support to it with clamps to the main pipe or a gusset near the end and middle. A 1/4 wave res designed for that low an rpm would be extremely long. They were also called "interference" pipes in the 60s.