well this website sucks it wont give you the answer
modified style
nope the 351 modified is a big block and a 302 is a small block
See the link below for a sample of the modified block style business letter.
The date on a modified block format is one blank space below the return address.
ÒThe modified block letter format is usually used for personal letters and informal business correspondence.
Heading, body, and closing
modified style
mrs. okelley is mean
block and modified block (NovaNet)
they both have same return address and other things but accept the full block because full block the closing is in center of the page and the margins of modified and flush left. Flush left means all modified block has to be in left. But not in full block.
In block style letters everything lines up to the left of the margin. In a modified block style everything lines up at the left except the address which appears by the right margin.
See the link below for full block and modified block style letters.