I think that truck and Malibu need L67 swapped in, and you'd be just fine.
Really, though, you seem to have done really well with the bike. See if a friend of yours can buy it, and you'd be able to hang out with it quite a bit.
A friend of mine recently got a 99 Regal LS, but he doesn't know much about cars and lacks respect for the 3800. He says the car is a lemon and breaks down all the time. With all crazy bias aside, I honestly believe there can be some bad 3800-powered cars out there because of poor wiring, bad transmissions, unregistered wrecks, warped heads, etc. Look even more closely than usual at the Bonneville you want to buy because you don't want to get rid of such an awesome bike for the sake of consumerism.
Please, admins, don't ban me.
If you truly want a Bonneville because it'* the best choice for you, and you don't want to get it because it'* representative of something you had a while ago, great. If there were something else up for trade instead, like a junked 60s-era stove no one will ever use again but has phenomenal sentimental value, I'd be all over the idea of you selling that thing. However, the bike seems to have great potential, and you've already got two cars. Maybe you should get rid of the Malibu? Which engine is inside, the 2.4L I4?