Would these rims fit?

[bookzguy]

...on a 1966 mustang coupe with grab-a-trak 1" drop with shelby drop and 1" lowering block, also note that front and rear fenders have been rolled.

18" Ford Wheels

 

[2+2GT]

If they're what I think they are, you'd need spacers.

Mustang Wheel and Tyre Chart

 

[dodgestang]

...on a 1966 mustang coupe with grab-a-trak 1" drop with shelby drop and 1" lowering block, also note that front and rear fenders have been rolled.

18" Ford Wheels

While the offset is incorrect for some vintage mustang they could work with adapters however they will not fit for you even with those. 9 inch is too wide for the front of a 66.

 

[bookzguy]

How about 2003 Mach 1 oem rims (17x8)? Would I need spacers or would they fit fine?

 

[dodgestang]

Through the use of adapters to adjust the backspacing to 4.75 inch those wheels can work/will work on the car.

You will need different tires however (in case you are looking at new take offs) since the newer mustangs have 55 series 17s which are taller (larger over-all outer diameter) than the vintage mustangs ran with.

 

[creedog]

Instead of starting a new thread, I thought I would piggy-back off of this one since it is the same type of question.

1966 V-8 coupe w/ front disc brakes and rear drums
current wheels - Coys C5's chrome finish (soon available for sale)
front - 17x7 w/ 4.25" backspacing
rear - 17x8 w/ 4" backspacing (I believe) or possible 4.5"

I want to go to 0mm Offset, 4.0" Backspace Ion's 625 17x7"s all the way around because I was told 17x8 will stick out in the back due to available backspacing. I want to run 225/45's in front and 245/45's in rear. I was told no spacers would be needed. Do these sound feasable?