Butler Performance on Instagram: "Nasty 66 Pontiac GTO Burnout w/ Butler parts under the hood From Rich Moreno @zombie1911a1 “It’s a .060 over 73’ 400 block , speed pro forged flat top pistons , cast 67’ rotating assembly ( i know but she’s got arp mainstuds and rod bolts holding for dear life) . 62 casting heads with stainless valves ported and polished with the heat cross overs blocked with aluminum. Comp Cams hydraulic xtream cam with 244 - 246 duration @ .050 and .510 - .515 lift on a 110 lo