Looked at the pics, is the housing as thick as the gasket flange all the way around?
What would happen if you were to drill and tap splayed holes for a plate, instead of welding it?
Welding cast is definitely an art, and I have yet to see or hear anywhere that welded cast iron is as strong as before it was broken...if you are worried about coming down on that thin of a housing thickness, what would happen to 5K (or even 2.5K) coming down on cast iron thats been welded?
just throwin' out ideas, I don't think having splayed bolts would help any. Then of course you'd have to worry about the heads getting torn off, unless you had countersunk allen head bolts, and so on and so on... /forums/images/graemlins/smile.gif