All the brass bushings and such is more important for salt water, fresh water is not as corrosive, therefore, why spend more when ya don't have too. The Weind 8004 is a fine manifold and should work well in your application. Summit racing should have all the install info you would ever need for that manifold. Height wise, I would doubt much more than +/- .500 difference in height, but you could check the specs to compare. As for the qjet, it is missing a few parts, and that's just on the outside, if I could open the unit up, and check the air horn, only then would I know if it is a good buy. Personally I would rather have one complete that came off a running engine that requires rebuild.