I am converting my 89 RS L03 5 speed from TBI toTPI. So far i have a complete 5.0 tpi setup from a 88 GTA minus the harness. I have a pair of 081 305 heads, L98 camshaft, TPI manifolds and y pipe. I am fully aware that 89 305's have no ninth injector, vats, and a maf. I was wondering if a 89 iroc tpi 5 speed harness will work and plug right into my dash harness? I would like to keep things looking stock and identical to a 5 speed tpi iroc. If the harness is not a practical option would i be better off getting my existing harness converted to a tpi map setup instead??? I am looking to duplicate a 89 G92 iroc with the 305 tpi, any help would be appreciated!!!!