Quote Originally Posted by andrewforbes View Post
This is all very interesting, it seems it comes down to personal preference, I'm a fan of 351 clevo but always heard the 351 Windsor were the better engine. Is it possible to fix the breathing issue of the Windsor? Brother n law is building a xy gt replica n is considering a 351 clevo with 4v heads, is there a particular way of identifying both engines other then the stamp on the block
You wouldn't persevere with a 351W, too many issues and drawbacks. Much better off with a 351C (or 393C stroker) or little 347W with alloy heads.

351 4V clevo has the water outlet in the block not the manifold and the 4V heads have a "4" embossed on the top corner of the head near the rocker cover face.