im supposed to pick up a 6 mil stroker crank from a guy i know cheap....ive heard bad things about the 6 mils being time bombs...anyone have any experince with them? im looking to build a drag blaster and i wanna go big with it. 6 mil with a 240 top end ported blah blah blah and going to try to build a custom frame for it also but the motor is the main concern. is the 6 mil bad news? also anyone running lock out clutches and override trannys?