Quote Originally Posted by 1project2many View Post
The main difference is between $32 and $6E is that $32 was written to work with a 9th injector for cold start. This was a temperature activated, constant flow injector in the floor of the plenum. $6E had a "new" fast start routine that eliminated the cold start injector. $6E has always been considered an upgrade to $32 and ARAP (a Vette cal) was rumored to have been the best MAF equipped L98 calibration GM built. Supposedly it was tuned for the cars GM handed out to magazines and enthusiasts for performance testing. The TPIS miniram has no cold start injector so $6E is appropriate. The best choice is an ecm swap to a 1227730 with a speed density calibration from the last couple years of tuned port. Mark's probably right with that recommendation. But if you're not likely to get into tuning then $6E plus your ecm (the number you listed is just the last GM part number for what was originally a 1227165) is about as good as it's likely to get.
From earlier why things are differant...