Magnacharger kits only fit the later Eagle heads. Earlier 5.7L in both the cars and trucks have a different intake port configuration.
Early trucks use a completely different belt routing.
As for the tune, I am pretty sure the pre load on the diablo is only gonna work on a 2009-2010 Ram.
I have a 05, and the belt and intake configuration is completely different. Alternator and A/C compressor are in the way.
I was thinking I might try and make a rear rear inlet conventional N/C drive for use with the earlier trucks, using some adapter plates for the intake ports, And custom fabbing a rear inlet so the OE Throttle body is only flipped around 180 degrees, and just using some tubing to go to the stock airbox....
Good luck with the install.