Changed my mind - figure a larger more modern fan design with a shroud made more sense. So I chopped the dual Ford fans in half and started building a heat-shield/shroud.
High tech cardboard CAD (Canadian Aided Design) templating.
Transfer to aluminum.
Marked 1001 holes every half inch to be centre-punched, drilled 3/16" and counter-sunk (front and rear).
But first I had to make a centre-punch. Ground to a point, blued, and quenched in pure Canadian snow.
The painful hand-drilled aftermath. The purpose of the holes is two fold - one: ease of bending when there is about 30% less material to work against (the counter-sinking reduces potential stress risers/cracking points), and two: pressure reliefs (who am I kidding... I just think they look cool).
Twins.
Rigged up my fancy sheet metal brake. Funny thing is I have to do the bending by hand - this is why I workout. Right? Riiiiight...
1 million test fits and trimmings later... it still is too tight to the turbo flange. But, I have some ideas...