Originally Posted by CdnoilRAM
6.1L crank uses a 32 tooth reluctor wheel and the new vvt 5.7L uses a 58 tooth, Manley does offer a 6.1L crank with a 58 tooth reluctor wheel but you'd need to pick up a snout spacer for the 5.7L timing set. There's not much room to over bore the chambers, and doing so reduces the number of potential rebuilds if something goes wrong. I have a 349cu in vvt block with a 6.1L crank and the bore is 3.937", the engine builder had to swap reluctor wheels and I just put the engine in this week and so far we haven't been able to get it to fire up, but I'm hoping it's just a startup tune issue.
so did you use the srt crank and have them add/swap the 58 tooth wheel?
Sounds like an easy enough fix to getting a hard crank for a good price. with good rods and pistons you can boost away.