Was wondering how you were making out.
1. how much difference in blower frame width and mounts once they are bolted in.
2.Are your brackets straight down or do they have an offset bend ( similiar to the ones pics)
3. Possible fix: split the difference , space the bracket inward with washers or plate.
Now for the fun part,:banghead3:banghead3:banghead3
When you tried getting the clutch pulley pass the cross member, was the clutch unit adjusted all the way back ( 3 9/16ths or 5/8ths bolts on bottom,1 lock-nut and adjuster bolt on bottom towards the front of unit. It will still be tight squeeze. Changing belts can be more challenging, sliding that unit back in forth.
My GT, which is what I'm using now for snow removal has that cross-member cut, easier mounting unit and belt changing. My LT has cross-member intact has been delegated to grass duty's.
YEP its a wee bit of a bear to wiggle on (note that it will gain weight over summer months)