Quote:
Originally Posted by Mark Yacavone
Just checked with a preeminent NHRA tech man.
Nuts have to be tack welded on ballast attached to the frame.
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My rule book says: Removable weight must be securely mounted to the frame or frame structure by a minimum of two 1/2" diameter steel bolts per 100 lbs, or one 3/8" steel bolt per 5 lbs, all other weight bars, pucks, etc. must use 1/2" diameter SAE grade 8 bolts for attachment. Every Comp car or Pro Stocker has multiple places to bolt weight in and the nut has no weld.