63 Small Block Distributor / Firewall Clearance

Anyone drop a small block in a 63 Valiant or Dart and have an issue with the distributor hitting the firewall? I read somewhere the 63's firewalls were different near the wiper and this was revised for 64 so they could fit the 273 in them. Any pictures of either a 63 with a small block in it or even the area around the distributor in a 64 to 66 would be a big help. Thanks