This was an ambitious project and took much time, so don't feel it is a regular checklist item. It mainly helps if you plan upgrades like HEI and EFI. A few before me did similar, but I didn't see posts w/ photos. I am planning EFI for my 64 Valiant too, so looking for another under-hood relay box. Amazingly slim pickings on ebay, so maybe my next PickNPull trip. After looking a bit, the 91-95 Jeep box I used on the Dart still appears about the best candidate. Mopar minivan boxes should work too (a FABO guy used one). The Slant is a little harder engine wiring since you can't run across the front timing cover like the SB.