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					Originally Posted by particlewave  If you’re going to add a crossover, I would think that upstream of the mufflers would be best. | 
	
 
This is what I would expect to be the cure for the drone - at least it worked real well on one of my ex cars with V8 and 6-71 blower (years back) to eliminate the drone all together.
Time to find smaller size decent mufflers  that allow room for a crosspipe with crossover in a same space where the original muffler is.