UPDATE... I believe I'm getting closer, a computer tune may be needed still but I'm a bit more satisfied. I am now using the 3.1L computer with the 4.3L injectors. Seems OK
:::A run down of what I'm using:::
-Clifford 2/4bbl aluminum intake
-custom made TBI adapter
-4.3L TBI unit off of a 88-92 4.3L V6 w/ Throttle Position Sensor and Idle Air Control Valve
-Manifold Absolute Pressure sensor
-Coolant Temp Sensor
-O2 sensor (1 wire)
-Knock sensor
-Electronic Spark Timing module (for use with Knock Sensor)
-GM 250 Inline 6 modified H.E.I. distributor (vacuum and mechanical advance removed and locked down)
-Electronic Timing Control module (wired to distributor for computer controlled timing)
-3.1L V6 TBI computer from a 88-92 Chevy Lumina Van (or similar)
-External mount electric fuel pump (Using a Carter P5001 pump made specifically for TBI conversions, and is a siphon type pump meaning it can pull the fuel and not just push)
Some good links for those looking into going this route
http://www.bustedjeep.com/projects/junkyardtbi.asp - this link was very helpful to me and is a good how-to
http://www.championparts.com/tbi_applications.pdf - this link would be good for those wanting to use multiple tbi units. For instance using a dual carb manifold with two 1bbl injector units.
http://chevythunder.com/gm_throttle_body_injection_pg_1.htm - a link with a list of different TBI computers and their applications
http://chevythunder.com/1227747_ecm_198892.htm - a very useful wiring diagram
http://forum.ih8mud.com/hardcore-corner/106273-where-start-gm-tbi-conversion.html - another TBI conversion thread
