yeah these old trucks are fun, when I went through the 4-spd, it had sat for 5-years, I learned that there was no front seal, there are reverse threads on the inside of the front cone, called a "back wind", thats all that keeps the the gear oil in........ go figure

 

Casting numbers on my Y block bell housing for a 3 spd is TAAM7505A. Most people on places like Ebay wouldn't know the part number and would probably use the casting number.

 

Thanks so much for that info.

 

Check with KevinBigWin on the 48-56 forum. I bet he has an extra bell housing

 

If it's going to be a daily driver or do much highway cruising, consider a newer overdrive transmission. Here's one source:
Ford Y-Block Transmission Adapters

 

It's not gonna drive more than 200 miles a year. Probably not more than 100... just the odd summer cruise.