I help install and tune a Sniper kit on a 505 inch Mopar big block today. This was a nice pump gas engine that is going to go into a New Yorker. It has a modest hyd roller cam, Trick Flow 240 heads, 9.8 compression and a Performer RPM. The Sniper kit was complete with Hyperspark distributor and ignition box. Started up perfectly and ran great. Zero issues with the Sniper install. We had it running first thing in the morning and finished all of the dyno pulls before lunch. Engine ended up making 570 hp and 640 ft-lbs of torque. Torque was over 600 ft-lbs from 3000 to 5000 rpm so that old New Yorker should really pull hard on the freeway on ramp!