By this point in life, I’m the PO that the PO warned you about… I’ve had it long enough that there’s nothing else the PO prior to me did left. 30+ years later, I can only blame my younger, poorer self, who had more time than money on his hands. Fortunately most of my decisions weren’t terrible…...
Given you’ve got a v8 conversion already, you don’t need a Marks kit. All you’d really need is a bel housing like the one here… Engine Adapter Kit - GM V8/Land Cruiser Transmission - FJ40, FJ45 1973-1984 -...