That spacer would be perfect, but I sure don’t want reduced power.
spacers are pretty cheap. you can find them new for ~10 bucks and you can buy them all day long for $30.
go to a swap meet, and you can probably get a guy to throw a carb spacer in with another purchase.
get a spacer, go to a track or empty lot and make a couple of passes ( get a consistent time ), put the spacer on and see what happens. if it's bad, take it off.
tain't rocket surgery.
http://www.hotrod.com/articles/0601p...ap-horsepower/