351C4V head questions

[Blue88Coupe]

Can I slap these on a 5.0 or does it have to be an older 302 block? I understand there are differences in the boss block vs the standard 302 block (four bolt mains etc.) I also understand that it will have to have a set of pistons that work with the heads.

Secondly how many rpm can I turn a stock 302 rotating assembly before mass destruction?

I want a high rpm solid cam beast to play around with. Something like the trans-am boss 302 or the z-28 302.

[dumpycapri85]

You will also have to plug some of the cooling ports on the head surface and drill and tap a hole in the front so you can route coolant to the radiator . I would balance it and use a good balancer and a guirdle . Do you already have the heads ?

[silverhatch]

That's clevor.

[dumpycapri85]

I would rather do it with a 351w .

[Blue88Coupe]

You will also have to plug some of the cooling ports on the head surface and drill and tap a hole in the front so you can route coolant to the radiator . I would balance it and use a good balancer and a guirdle . Do you already have the heads ?

No heads yet. Im talking with a guy on craigslist that has a bare set for 150

[dumpycapri85]

What year and series . I have a complete 4v motor and have been kicking around the cleavor idea myself .

[Blackpony]

It takes some modification to the block to accept those heads correctly. Look it up on google. There is tons of info regarding this swap..

[Blue88Coupe]

What year and series . I have a complete 4v motor and have been kicking around the cleavor idea myself .

Hes gonna get me the id stamp, dont know yet. Theyre closed chambers. Whats a good year to get

[dumpycapri85]

Close chamber 4v's are the best 70-73 . 2v's are the most common and not realy worth the cost to do the swap . Mine are 4v open chambers so not as great but you can always use a popup piston to get the compression . There are aluminum Cleavland heads avalible also that have the best of both styles like the Aussy heads . Close chamber , raised exhaust ports that are smaller for beter velocity , ect .

[FastFox]

I think it takes a special intake manifold to match the Cleveland heads to the Windsor block. I bet there is an aftermarket intake available. I bet it is pricey.

[broke again]

I think it takes a special intake manifold to match the Cleveland heads to the Windsor block. I bet there is an aftermarket intake available. I bet it is pricey.

yes it does. they use to be out of production but you might be able to find one floating around on ebay or the corral. Not a lot of options.

[Torinoman]

I have a complete Cleveland short block that I'd be willing to get rid of cheap if your interested. It's .030 over and could use a clean up hone from some light surface rust. It's not assembled but it should be a good start for a little street build if you interested.


If your set on doing a clevor set up use the 351 as a base. Those big 4V ports love the cubes. CHI in Australia makes intakes for whatever you wanna do and they have kits for the water passages and thermostat. If using a 302 block you can find a boss 302 intake pretty easily

[FastFox]

Those heads have ports almost big enough to live in. I agree that it would take big cubes or high RPM to really take advantage of the extra flow.

[FastFox]

I just got my new 5.0 and Super Ford magazine, and there is a story on building a 408 stroker motor with after market Cleveland heads. They refer to an older magazine that has an article on building a "Clevor" as they call it motor. Pretty good read.

[homealone]

I think I need to start working on the Cleveland style headed Windsor I have sitting next to my 69 Fastback. :wink1:

No heads yet. Im talking with a guy on craigslist that has a bare set for 150

Google Aussie heads. There is a company out of Seattle importing them from Australia. Really cheap too. And what's better is that you can get a closed chamber 2V version. Best of both worlds. The 4V heads are cool and all but don't wake up until about 4500 rpm.

I think it takes a special intake manifold to match the Cleveland heads to the Windsor block. I bet there is an aftermarket intake available. I bet it is pricey.

They make adapter plates starting around $120.