Where can I get a cheap kit at.

 

Summit, they have their own kit, like $45 or so. But to be legal for nhra/ihra I believe you have to have a sealed wall between the passenger compartment and a cut off switch outside the car near the battery. This maybe only at certain speeds/et's.

 

I can't seem to find it at summit

 

Search for Moroso battery box. I got the sealed one but don't get the Moroso cable kit -- the Summit kit is half the price with a heavier guage cable. It was ~$100 for batt. box and ~$45 for the cable kit, if I recall correctly. Routed up to starter and kept stock cable from starter to positive bus terminal on inner fender. I also threaded cable through pieces of 1/2" heater hose to protect it from rubbing on stuff under car.