The note is a product of the firing order as well as the mufflers/pipes. Some engines just sound plain nasty no matter what you try
Mine is getting played with soon - having a tray back makes it easy to experiment - NA first then later with a supercharger. Although it's likely what fits under my Frankensoozoo will not fit under a VX I'll keep yas posted.
Has anyone tried an Edelbrock SDT muffler? They make an 18" flat oval model with no fiberglass to blow out. They make a stainless steel version for about $170.
Roy