was wondering if i put my bmax bottle on the side walls of a 42 fountain if it would be ok . there is no room behind the engines with all my crane stuff and headers its side by side so im thinkn of mounting them just forward of the engines high up so the flow would still be the same just 2 1/2ft more of hose.

The shorter the better !!! Somewhere on the transom is the best spot.

really no room there, i know the shorter better but what else can i do , as long as its still above it should do since its a vented system rite?

When in question call the factory,they designed it and built it..I would take there advise..

Make a bracket or have one made to incorporate the bottles close to the drives.