This subject seems to cause confusion for a lot of us.
I've tried Clifford headers with dual turbo mufflers and with no crossover. (that was before H pipes became popular).
Sounded awful! The 194 w/PG sounded a lot like a small plane taking off.
I had a muffler shop make a Y pipe and run through one turbo muffler.
Much better deeper sound.
Now I have a Flowmaster Y collector for my 292 which should help.
The thing with the crossover is that it seems to me that the way the header collectors are staggered one needs to be extended.
This makes the front three cylinders have an extra long collector vs the rear three. But maybe the pipe size should be reduced before the crossover?
Can anyone shed light on this?
Maybe I think too much?
Thanks
