theres probably going to be a lot of bashing and trashing here asking about the 440 source stealth heads. im potentially in the market for some avg. guy alum heads and its 1000.00 for the stealths or 1500.00 for the eddys. id be changing springs, retainers,locks, checking valve job etc with ETHIER heads. whos got the stealths and whats to know about them? any tricks? the straight plugs help my pistons and headers... lookin better than the eddys at this point.....!!