[stiffy]

Guy's,

The HP Tune and EFI Live do not speak to each other.

You will need to detune the original system ( EFI or HP ) and set it to standard so the Tuner can access the ECU.

Find the Tuner of choice and stick with them.

IMO there cannot be too much difference between tunes. The motor has been around for ages and the Yanks know what they are going.

STIFFY