Is it possible to tell the difference between a complete 351 Cleveland and a complete 302 Windsor? Also, was a 302 Cleveland ever made, or for that matter a 351 Windsor?

 

yes you can the cleve has diff shape valve covers,,never made a 302 cleve just a boss 302 same heads...

 

there is both a 351 and 302 clev and windsors

the diff between the clevo's is that they share the same blocks but have different stroke
ie crank and rods

the windsors are slightly diff as the block with a 351 has a higher deck height and longer stroke

the heads interchange on both motors though 302 to 351 w to w c to c

apart from the boss c heads to windsor lower