If you want to mount your radiators in the rear, it's best to remove the stock corners of the Fiero (if this is what you are using for a donor). I'm attaching a picture of the area I removed and boxed in on mine. I used some angle iron and made some frames to hold the Civic radiators that would attach to the insides of the boxed in sections. I ended up going back in and removing more metal which is shown by the lines drawn into the pictures. The kicker is that all this work was in vain on my car since I'm going with a custom rear frame now and I'll build new radiator mounting areas on the new frame. My advice is that if you are looking at an engine swap, relocating the radiators, frame stretch (if not already done) and axle lengthen, you might want to consider going with a custom rear frame attached to the Fiero tub. I found that I've wasted a lot of time and money trying to modify a 30 year old Fiero to do things it was never intended to do versus just investing up front in the custom rear frame which would've been the more logical and cost effective way of doing this.Just some friendly advice from someone who has been there and doing that... Chris
