The Buick 350 replaced a Buick V6 in a Jeep. It was prior to 1995. I do not have any photos. I would take a Buick 350/TH400 home if if fell out of the sky undamaged though.

For the 455 Olds, there is a 71 page .pdf detailing one person's install on a GMC motorhome site.

Thank you,
K