1969 Dodge Dart backspacing

How was the BBP conversion done front and rear? I'm strongly thinking no to 3.75" BS on a 7" wide wheel.

With both 73-up swap and Dr Diff 13" front's I run a 17x7 with a 19mm offset, which is about a 4.75 back spacing. Rear I have an A-Body 8-3/4 with BBP conversion Axles that use factory BBP brakes (Not SBP A-Body as those are available) I run a 17x8 with a 19mm offset as well, which is about 5.25" of back spacing. Car look like this with them same wheels and tires in each pic.

Stock 73-up disc and 11x2" read drums
GTS1.jpg

Dr Diff 13" front and 11.6" rear discs
GTS.png