swap a 3800 series II into my car that has the series one? could i use the engine cradle from a newer boneville or would i have to modify one from a 92-95?

Wiring will be different as will fuel lines and all throttle controls,and ECM. Better off to find a newer car with the series 2 engine. Just my opinion, as I have undertaken some of these bid challanges and 1/2 through was wondering What was I thinking!!!!

Hes quite right, you will basically need everything from the front half of the car to get it all to work and you need to use the 4t65 transmission for the series II so the tranny will hold the added power efficiently. The cradle from what ive heard will hold both motors with minor modification, its the wiring that becomes the biggest problem. It CAN be done, several HAVE done it, but they would prolly agree to look for a new car with the series II

Just my opinion, if you have your heart on doing this, there are several that can give advise on what you would need... i know i had the same thought going, i opted for the newer car lol. But its your car, your time, & your money. Well just give advice and opinions

Good luck
- TL

I got to looking around and actually found a thread on this if you would like to read it there may be some info to sway you more one way or another

https://www.gmforum.com/t277588/

good luck again
- TL

thanks guys, its just something i thought could help me get some extra life outta my bonneville because my engine cradle is starting to show its age after all of those michigan winters and i was thinkin why not spice it up a bit too while im at it