No silver solder wouldnt work,too much crack,they are a good 2-3" on both sides.The thing gets really hot,reckon it would melt too.
I did mount it flexable at the rear,i used one of those motor mount rubber things on a homemade bracket,think it might have been a touch too flexable,plus the poor quality steel in the pipe.
On sunday i ran it full throttle for a good 10 mins. per tank,with 3 tanks,should be able to take it though.
Real shame,the combo was a good one,his boat with a differant prop was nite and day,zero chine,full round the corners.
Brod...