67 340

A 340 block is a 340 block...

It's what you put into it and on it that makes the difference....

I have this info saved on the 70 340 TA blocks. Ignore the circled paragraph & read the info next to the blue arrow....

View attachment 1715287836

Except for the T/A blocks...

They had thicker main webs...

The odds of finding one of these blocks is very slim....