Curious, were you able to observe how wide its rings are ? Pistons; hyper or forged ?Got the Blueprint 430/450 to 383. Have had it for 3 year no problems. Added better heads and a lil hotter cam to it. It responded admirably. Also add D.U.I. Distributor with a curve set up for my application. Going into the engine found no surprises or sub standards parts. If I could ever master tuning my carb….