If you were looking at a mid 50's Ford or Merc to modify for street use , what would be the advantages of a Y block vs. an FE ?  I'm wondering if the small block Y is lighter , cheaper , more bang for the buck over the big block FE .......or is it just a matter of personal choice ?

I'm asking this because all my Ford experience over the years consisted of 289's , 302's and later modular motors 4.6 and 5.4 .

Thanks , Terry