393C school me on this motor please

5.0ina66 said:

I can't think of a single 351W part that will work, even the thermostats are different.

That's a 351C with a stroker crank in it. Sounds like the block has had some serious work done to it if it's been sleeved...that was the hot trick for 351C motors 30 years ago. If it's got early 4V heads on it, it should run like a mofo. If you ask most older gearheads, Clevelands were the only ford motor that would run worth a crap, until the 5.0HO came out.

The nice thing about clevelands is you don't really NEED aftermarket heads to make 450hp, you can dang near fit a golfball in the 4V ports. Technology has caught up with the Windsor motors, but built right, Clevlands are still a force to be reckoned with, heck they have won the Engine Masters Challenge like 5 years in a row now.

Oiling and/or high RPMs are what kill Clevelands....the oiling mods to make them live at very high RPM are very well documented though. Cleve blocks are not QUITE as strong as a 351W block but they are still pretty sturdy.

Edited to add: The #1 internet myth about these things is "you can't build a good street motor with 4V heads" and "4V heads don't make torque". I've seen 4V clevelands that will tow a mountain, win most races, and still be tame enough that your granny could drive it to church.

Click to expand...