It definately sounds like you broke your input shaft especially since you dont have any noise while reving it in gear. One way to verify this is to watch the "Trans Input Speed" signal with your PT scanner if you have that available to scan. If there is little to no rpm signal then your input shaft is broke, if you show rpm that is in close relation to the engine rpm then your chain snapped but I would lean more towards the input shaft. Your cheapest option for an upgrade is the 4340 shaft from ZZP and that should work ok for your setup but I would spend the extra money and get either the Intense shaft or the 300M shaft from ZZP as they are both much more durable. At your level I wouldnt worry about a single chain upgrade but it would definately be a good idea to swap in the dual replacement chain set from the V8 cars which is stronger. I sell these chain sets for $69.95. As far as the shift kit goes the Intense kit is definately the most complete one available and will work better for you. It includes heavier springs which are much needed as well as a number of selective shims and spacers so take Sabrewings advice on this one, you wont be dissappointed. Also the tune has a large effect on shift feel so it would be a good idea to talk to someone with a powertuner to help you out or get some advice. I use HPTuner and things are set up a little different so I cant give you direct examples to use. I have a writeup on here somewhere for a gear ratio swap which entails replacing the chain sprockets and the reassembly of the channel plate and valve body as well as torque specs. You must also make sure your pcm is properly set up for 3.29 gearing as stock it had 2.93 and this will throw an incorrect gear ratio code and cause a number of problems. You may not have your shift mph and timing tables set up properly for the 3.29 gearing so that may be adding to your odd shift behavior.
