Muggy weld and cast aluminum

I was thinking of using Muggy weld super alloy 5 to weld/solder some breather tubes on a pair of cast aluminum valve covers. Do you guys think it will work ? Or, will it be a waste of time ?

it does work , just gotta take your time,, i fixed 2 68 mustang headlight buckets with it,, you dont get many sticks for the price thats for sure,, keep it fluxed and youll be fine,, its sands real easy