Ah, yet more interesting information. The OBDII confuses me a little. If the truck gets an LS1, doesn't the ECM talk to the OBD system and record emissions data? Thinking there are ways around this, has to be. Main fear is we go ahead and do the conversion and do it right keeping everything else factory like gauges and such. I can get a safety inspection and get it passed with a V8, I know a few people
. I was an ASE mechanic for like 7 years so over those years, gained quite a few friends in the business. Dunno if any would be willing to overlook that it is a V8 though. Worry about that when the time comes.
Anywho, my fear is I go for emissions and they plug into the diagnostics port under the dash. Doesn't that give them the VIN of the truck thus denoting it is a 4 cylinder? It will also give emissions readings too if I remember correctly. If so, the LS1 emissions parameters most likely will not match those of a 2002 4 cylinder S10. Could run cleaner which shouldn't throw any flags. However, if it runs out of parameters (as in bad for the 4 cylinder config) then we're in trouble correct?
I dunno, this is getting pretty frustrating! Really need to spend some time researching this and talking to folks that have done this. What the guy at Dobbs told me makes more sense and is more along the lines of what we were thinking. State/Federal shouldn't care about the engine configuration as long as the emissions equipment matches that of what came with the 4 cylinder for this particular model year. Then again, like a few have said...... the LS1 isn't going to produce identical emissions results as the 4 banger does for the model year of the truck.
OR, back to my other hair brain idea mentioned elsewhere in this thread. Get the truck inspected as a 4 cylinder configuration and get it all legal and go for the 3 year plate option. THEN, do the full V8 swap and run it for 2 years and 10 months. Then when it is time for inspection again........ yank the V8/6speed out and stuff the 4 banger back in. Course I am sure there are more things to worry about if that were to be done. Such as, when installing the 4 cylinder again what would you do about the computer?? ARGH, damn laws. We shall see.
Thanks for all the help, Feel free to continue posting more info