Anyone know much about 50's dodge cars?

I can't say for sure, you'd have to measure the existing and the 81/4. Of course if it's too narrow you can always mini-tub it. I have heard of guys using fornt ends of of Volare's & Aspens on the 51-56 MoPars. Check out www.dodgecoronet.com - the dodge coronet registry there are some articles on there about it. I think DJVcuda is the guys name, he and his Dad did some work on an older MoPar like you're talking about and posted it with pics, etc. You can always contact him through the website after you've joined and ask him for some info- he also happens to be a contributing writer for MoPar Enthusiast Magazine.