best hi flow ex manifold/drivers side

I had thought about a bit of angle milling to raise it. I do have a thin aftermarket steering column (actually just a thin shaft) & the coupler is narrow too so I might be good there. if a bit of grinding on the top of the box/bottom of the manifold & maybe a bit of angle grinding doesn't cut the I'll likely have to raise the engine (& I am using using OE 273 mts with the ear welded on the one side & the OE tall/thick black rubber biscuits) OR cough up the bucks for an early 340 manifold like Professor Fate originally posted & 2&1/4" exhaust is dictated. RR