Wheel backspace and width advice please.

[NitroMike]

Sorry to beat this topic to death but I just want to check for opinions before I have wheels made. 67 short/wide, 4.5" drop front, 5.5" drop out back, discs on front. Ready to order 15 X 8 with 4" backspace for the front and 15 X 10 with 4.5" back space out back. Is this the correct set up or should I use 7" deep wheels on front? Don't have the tires yet. I'll buy them for best appearance after the wheels.

Thanks for your patience and advice.