Randy and all, They didn't make an error...they did a typo. They aren't saying a Mopar 340 cover will work. They are saying the Mopar parts replacement 304/360 front cover will stand up to 390/401's pounding. The '340' is a typo of '304'. Ya gotta read it s-l-o-w-l-y! :) How about the OTHER boo-boo? Primedia's 'Muscle Car Review' Annual features Pete's Patriot SS/AMX and tells of the car's "Cragar Street/Pro wheels... Stockon Wheel modified the Cragars so they'd have a 4-inch diameter up front..." Gee...ya suppose they meant WIDTH?? John W Rosa www.JavelinAMX.com