Thanks 64ragtop. Yep, the firewall has gone under some massage. Had to cut a piece and weld in an other. With grinding and paint it looks nice. An other thing was to change the centerlink to the dropped V8 centerlink.
I love the 63 Dart, had one back in 73, swapped to V8 in that one to, but was forced to sell it. The reson was that the "good lookin' lady" get pregnant. I still have the lady, four children, six grandchildren, and since three years a new 63 Dart project.