first ever L67 into an L36 in a bonneville I think...Ive heard of it done in other cars, but not a bonnie.

It was a Series One L67 replaced with a Series II L67

so which engine did you end up using? The Riviera'*?

Excellent work! That thing is gonna haul! You should be able to keep up with the GTP'* now with a few mods.

I did a Seris I L67 -> Series II L67, Wasnt a hard swap, but it was neither a walk in the park. I did go with the riviera it had around 140,000 on the car but the engine was a replacement under buick warranty so it has relatively low miles on it, and the owner also got all the work done at buick on scheduled maintence. But I know my transmission in the bonneville has between 70-80k miles on it, and I cant imagine the engine being far from that so Im good to go, I need to actually stop in at a buick dealership to get the print out of service record to be sure though.

And too all my knowledge this is the first Series I L67 -> Series II L67 swap done in a bonneville, and if there was another it would have been nice to know that earlier =)

we need pics spiral

i gotcha. Looks like you have plenty of room in there. How do the S1 bonnies compare weightwise to the S2?

of course it fits fine, its pretty much a direct drop in. lets see here, for differences Ill outline them quickley

AC Bracket
AC Compressor
Engine to transmisison support bracket
EGR - Im running it EGR-Less :?
Flex Plate
Lower radiator hose
Both heater core hoses
Throttle cable
And of couse a good amount of wiring modifications
Custom PCM

very sweet!