Hi Darren, I'm glad to assist you. No, this is not compatible. We do not carry the correct and matching harmonic balancer for your car, unfortunately. Check our sale price offer for an adjustable open wrench, if you need brand new tools for your maintenance needs. Grab our sale price offer and click the link below to order today. I hope this helps. Happy shopping. https://www.carparts.com/wrench/oemtools/g5222653?&vehicle[cylinders]=8&vehicle[liter]=4%2E7&vehicle[submodel]=Base&vehicle[model]=Capri&vehicle[make]=Mercury&vehicle[year]=1966?can=CPJE1043

Hi, I'm pleased to help you out. In as much as I would want to help you, I do not have the complete vehicle information to work on. You can do a manual check for the availability and fitment - On the Homepage, please enter (complete) your vehicle’s year, make, model, sub-model, and engine size. Type the part's name in the search box. Once your application is selected, you’ll see a “Guaranteed to Fit” badge if the part will fit, and we recommend that you also double-check Your Vehicle Fit Details as well as the Vehicle Fitment Information table on the product page. Glad to be of help. Happy shopping.

Hi Ed, About 75% of Dorman parts are sourced from China

Hi- As per checking, the dimension of this item is 7.78 x 3.38 x 7.78 inches. It should be the 7.78 diameter if I am not wrong. Still, we fully can guarantee that the diameter is exactly the same compared to the factory original of the selected vehicle application.