1963 Plymouth Valiant Signet Convertible Restoration...HELLLP!!!
I did the 273 V8 conversion on my 63 valiant convertible. There is a bump in the firewall Below the wiper motor that you will have to get rid of ( there is nothing behind it ) so I heated it with a torch and pushed it in. You will also need a dropped center link and a center sump oil pan. Mine is a 4 Speed so I’m not sure about what to do with the trans. Most of the parts I used were 68/69 dart. I also used stock manifolds because if you decide to use headers they will need to be fender well headers due to limited space and are very expensive.