Ughhh..., my car has gotten rather dirty. But, I think I have only driven the Turbo Pinto all of three miles in the past year. Anyway, here is the marginal clearance I have with the IHI wastegate. As you can see the sheet metal has a downward curve. I drilled a hole so flammables can't puddle.
The whole fit is very tight. The steering rack to oil pan, the rear starter bearing to steering rack strap, the upper throttle body to hood and as shown the wastegate to inner fender all have no more that 1/8" clearance.