holley terminator x tuning for 5.7 hemi

Hey guys did a 5.7 hemi swap. Truck runs great, just looking to do some tuning to get to run right. Running a Holley Terminator X, any one in the California Bay area?
How easy was the terminator x harness etc to install? Any issues when installing as looking at this for my hemi swap. Still collecting parts for my swap