I have a 2012 Challenger R/T which originally had the 68139871AD operating system (which I understand is/was native to 5.7 engines)

I have put a 392 based 426 with a Whipple SC and other items in it and my operating system was changed to the 05035304AD operating system by a previous tuner (which I understand is/was native to 6.4 engines)

Today I installed an old tune from when the engine was still on the 68139871AD Operating System so that I can read it via the HP Tuner just to see what the tuner that tuned it at the time did in terms of tuning.

When I went to reinstall my current tune (which uses the 05035304AD operating system) the VCM Editor acknowledged that the tune was GPEC2 but the incorrect operating system (05035304AD instead of 68139871AD) and would not allow me to install the current tune (05035304AD operating system)

Additionally, I tried to copy the differences from the 05035304AD based tune to a 68139871AD based tune to get the car running, but it ran like dirt. When I tried to datalog it to see what was causing it to run so bad I received a message from VCM Scanner saying that the 68139871AD Operating System was not supported for data-logging.

So, in short..... help.

How do I reinstall my 05035304AD based current tune as MOPAR tuning does not seem to have a "Write Entire" the way that GM tuning appears to.

thanks-
rich