Will these wheels fit???? please help...

[aany001]

i was wondering if anyone knows what the back spacing would be on a 18x12 for a stock width 10 bolt in my 69 camaro??? the wheels have 5.5" of backspacing would I have to shorten my diff or not??? I already have the DSE mini tub kit done.
thanks in advance.

[ProdigyCustoms]

You will need to narrow it 5 to 5.5 inches. Somewhere in the 54 1/2 to 55 range.