If you're looking for an actual 1964 booster I can't help. You'll need to find a used one and have it rebuilt. Booster Dewey may have some. I think he 's in Washington state?? Maybe Oregon, should be in Hemmings or just google him. They used a single 9" with a raised lever type bracket and...
I have to agree. The thread was dumb to begin with and I'm not really sure what the "chicken shit" comment was about, they have a lot of chickens or their resolve.
I've never had an issue with Canadians, well just one thief that I know of. Frenchies can be a little high strung:dunno
All big engines pick up a lot of horsepower with good exhaust. The "bigger" the combo. cu in, cam, heads, compression etc the bigger the gains. A 340 hp is relatively tame, I would guess maybe 10-15hp. 425 horse 454 rats pick up 100hp going from closed to open headers.