Well, I guess I'm in the right place, with the perfect crossover.
Here's my 1948 Prefect, currently being retrofitted with a V8 60.
I also own a completely stock 1952 Popular.
38 coupe, I can't tell dimensionally, but all the bolt holes and locating dowels on this bell look to line up identically to what is shown as 49-early51 Merc. The perimeter pattern is also identical.
Wow, this ford stuff is complicated. All my GM stuff has casting/part numbers. Thank you all...