Originally Posted by trick_subie
I've used that system on some old street rods I've worked on, and I personally am not a fan. Iirc flatirons tuning in boulder, co sells a "speedo healer". They mentioned it to me when I got my lgt gears as my speedo is now off by a good bit. I haven't looked into it yet but it may be worth giving them a call. Good group of guys up there.
Thanks. Those are the same guys i got my lgt and front diff from. Great guys indeed.