I used to run the KB hyper pistons in a 360 back in the 90's. I gapped the rings for nitrous like the instructions said . I never ran less than 150 shot and ran 175 some times. I had the kb 107's and J-heads. I always ran about 28* timing and 93 octane fuel.Never had any problems...

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1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...