Blow proof bells

I have a quicktime. They make several for mopars with different trans combo's

http://www.quicktimeinc.com/products.html#mopar



These look like good quality, I think I'll be going this direction. looks to be around $450.-$500. Anything you had to shim? any problems or extras you had to purchase. I will see if anyone post anything better, but I am liking these.


Thanks,