L67 swap?

Okay, I've done a bit more research. Is there a way you can show me a diagram from a 2000 Bonneville ssei engine wiring harness and trans harness and the diagram from a 2008 Lucerne 3.8 engine and trans wiring harness. I should be able to use the 2000 wiring harness, but I would have to convert over some plugs and maybe a few sensors from an '08 or older Lucerne. Same for the 2000 ssei engine wiring, i'd have to convert some adatpers over. But it'll be cheap. But also, I would have to buy and reprogram an '08 Lucerne 3.8 ecu to match my vin which that wouldnt be a problem anyway. But its have to be 2008 and below because since my '09 cxl is more like a carryover, the only major difference between the 2008 3.8 ecu vs the 2009 3.9 ecu is just the motor and trans. So, I have to use the Bonneville ssei trans wiring and convert them over to the newer plug, just not from an 2009 model. Also, I'll feel I can order an upgraded 2000 and up Fuel Pump, that's meant for 3.8 Supercharged applications. But the factory Lucerne exhaust can fit, it'll be a bit restricted but that'll be just temporary. But yes, my 2009 cxl model is mostly just a carryover except for the change of the engine and transmission. So, the lucerne's drivetrain and axles is fine, I'm not trying to build a race car here, lol. But lastly however, I'd also like to have a diagram for the 2000 Bonneville ssei cooling system and the diagram for the 2008 Lucernes cooling system? I feel I would have to adapt some hoses from both the Lucerne and Bonneville to make this work, just not by too much. So just in case, I'd like to be prepared.

I think I made a mistake. The engine can work but not the transmission and the seller backed out last minute. So, this project just got folded. Good news, I'd try a l67 swap for a 2005 DTS Premium. I'll make a new forum soon as I do more research.