What's the best ratio quick rack for mac1 kit car thanks

Suspect that may be down to personal preference? How about asking Mac?

If the Mac uses an Escort rack...

I used to have a 2.4:1 ratio Escort rack from Rally Design - it was fun to use, but tiring on a long twisty journey (my wrists ached). I replaced it with a standard 3.5:1 and hated it as it was much too slow. Now I have a 2.9:1 rack (also from Rally Design) and that's a reasonable compromise for road use. It's also cheaper than the quickest one!

The rack is shortened Sierra . MAC#1 will sell you one with either standard or quick ratio. I have 2.6 I think. I haven't driven mine but have driven one the same and it was spot on.