Join Date: Jun 2011
Location: Colorado Springs
A basic 351C rebuild isn't any more expensive than, say, a 351W rebuild. But if you want to get some serious RPMs from the engine, some oiling mods would be a good idea. If you want to run an adjustable valve train, that can get into some money as you have to have the pedestals machined down to install screw-in, adjustable rocker studs. (Also a good idea, but not necessary if you'll be running a mild cam.)
Be very aware that building a Cleveland for performance, even mild peformance, is nothing like building a small block Chevy or Ford. If, for example, you install a cam grind that works great in a 351W, you'll likely be disappointed in how it runs in your Cleveland.
The myths and misconceptions we hear about the Cleveland are mostly based on people trying to build a Cleveland like a Chevy. The results are, "It's a dog below 5,000 RPM. The heads are just too big." Nonsense.
Check out the 351 Cleveland forum. Those guys have been running Clevelands for a very long time. You'll see some disagreements, but you'll also see some very good information.