Will mufflers from a 1978 550K fit a 1978 750K?

[cogwheel53]

Will mufflers from a 1978 550K fit a 1978 750K?  The Honda OEM part numbers are identical except for the last digit and their fiche images make them look identical. But looks can be deceiving, so I'm looking for some who knows for sure.  Thanks.

[comrusk7]

What I've found is that usually when you switch engines the headers might fit onto the cylinders but they will either not hang low enough to clear the frame (as in your case), or if you're going from a larger engine to a smaller engine they will hang too low.

Best to measure if you can and find out how much clearance you need from the exhaust on the cylinder to the bottom of the frame.

[Re-run]

I would be willing to say no on that. The 750 engine is bigger size wise. Maybe someone has dimensions for the 550.