I've built a few 410 sprint engines Rick. Never had the nuts to drive one of the cars though. The engines are all aluminum chevy small blocks burning an unbelievable amount of alcohol through a combination of 'dumb' fuel injection through an intake manifold and down nozzles that feed directly into the head's combustion chambers. They run around 15/1 static CR, use dry sump oil systems and crank case vac pumps to keep the rings seated. They have so much dirt ingested that extra alcohol is needed to wash the cylinders and all clearances have to be tailored to this as well. They are a sonofabitch to build and usually only good for one race. I lost my ass on them, so stopped building them and stuck to the standard roundy rounds and drag engines.
