I finally got the measurements off the 04-06 Wrangler Unlimited (2 Door long wheel base) and it is really similar to the 40. I ended up going with a waterproof breathable cover from Empire
Car Covers JEEP Wrangler Unlimited 2006 that I found through Amazon. A little more expensive $109 but it sounds pretty bomber. Here are the demensions of the Wrangler Unlimited as compared to MY 40...btw I have a Ehsan top and bows on which is close to a hard top in rear height terms so take that into account. It keeps pushing my spacing together when I post so basically the 1st dem is the Jeep and 2nd dem is FJ40.
04-06 Wrangler Unlimited VS 1973 FJ40 w OEM style bows and grill guard
Overall Length(rear tire to front bumper)
173" VS 166"
Cab height (measured from seat bottoms)
42" VS 39"
Rear tire to windshield(cab)
112" VS 83"
Lip of rear tub to highest point of roll bar (cab height)
49" VS 32"
Width of cab w/o mirrors
60" VS 56"
Width of cab w/ mirrors
70" VS 70"
Pretty darn close. I might end up getting one of the Best Top cab cover too just so I don't have to hassle with a full cover all the time but gonna wait and see how much I would need it.