Went to RockAuto.com the other day to get some freeze plugs for our '57 y-block. The ones they had listed were 50 something mm and when I measured the holes in my block they looked to 40 something mm (or vice versa, either way it didnt seem to jive) Did I measure wrong or are there different sizes available for different blocks???

I am really going to push to have this thing fired up for you guys soon!!! thanks-

All Ys as far as I know take 1 3/4" freeze plugs and a 2 1/16"  cam plug. 

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

cool, thanks, should be all I need to know to get some coming...