Peter - for a compromise of price and quality, I'd look at AFCO brand. Boettcher always has cheap AFCO and Wilwood parts. Their shop is only a few blocks from my place, so I can take some photos or pick up anything you might want. $340 for an alloy radiator is pretty hard to beat. This is the same brand that Scott and Craig/John White are using. Specs in the photo....
www.iboettcher.com.au/racing.html
About your electrical problem - I might be wrong, but if Ford use Bosch Temp sensors, you can replace them for around $20.