I'm sure you will get several different configurations that will make an 8' leader.
I use the set up for "Simple Furled Leaders" that Kathy Scott shows in her DVD.
Add 10% to the overall length. 96" x 10% = 105.6"
I'd make the butt section 40% of that, 42.24" and the intermediate and tippet sections 30% each, 31.68".
I'd round off the numbers to 42", 32" & 32"
You could add another step to the butt section by making your start and end loops 20 - 21" long for a 12/10/8/6 taper.