351 heads on a 289 (or 302)

[rerun]

does anyone know what exactly has to be done to get a 351W heads to fit on a 289 or 302? I know that the bolt holes have to be made smaller, is there anything else?

[GTStang]

You don't have to make the head bolt holes smaller. ARP sells a head bolt kit for bolting 351W heads using stepped washers for the 302's stock 7/16" bolts instead of the 351W's 1/2"

[fatninja19]

Whats the advantage of using 351W heads? Higher flow without having to spend bigger money on like AFR's or something?

[GTR2b]

351W heads have the same bolt pattern, larger valves, larger intake and exhaust ports and the spark plugs enter the combustion chamber at a more direct angle making them a good (ableit cheap) upgrade for a small block Ford.

Now for the problem... 351W's have a higher deck height that that of a 289-302. What does this mean for you? What will happen is when you bolt on your new heads, your intake manifold will not fit by a little less than about 1/8 of an inch on each side.

The only way around this is to use a 351W intake and mill it down (VERY CAREFULLY) and eventually it will fit.

That's pretty much it. If you don't mind me asking... what year of 'stang is this engine in? You may have other options if you're looking for more torque.

[StangNut86]

I have a pair of stock 351W heads that came off my motor. they're still in good shape, just need a little work and cleaning. want em?

[HiFlow5 0]

Originally Posted by StangNut86

I have a pair of stock 351W heads that came off my motor. they're still in good shape, just need a little work and cleaning. want em?

want, as in free? I'll take them!

[rerun]

GT, thanks i didn't know that, i have to look into it.

GTR2b, its going a 1967 Mustang Coupe (ahh.. fel, my baby) shes going though a TOTAL resoration, and is is right now smack dab in the middle. I was planning on useing the 289 (good pistons, cam, great rebuild kit, intake, carbs, heads) and use that for a couple years ( a 289 crank can only take about 450hp at the crank..) and while i'm driving her, by the time i'm out of high school i should have enough to make the real ass kicker. picture this: ALL foraged Blown Boss 289. its a lot of work and money but you can't put a price on something like that. Opps,i'm rambling again . As for the inake i was plan on running a 2x4 setup, and with that kind of set up(little pricy, and i'm on a small budget) i don't really want to buy a whole new intake.. do you know of anything else that i can do?

StangNut, thanks man, but i already got a place to get them. apperciate it though

[StangNut86]

Originally Posted by HiFlow5 0

want, as in free? I'll take them!

much as i'd love to provide free cylinder heads to all of my forum moderators, i'm afraid i'm a little too poor =). feel free to PM me or even catch me on yahoo/aol IM and we can talk about it.

[GTR2b]

Hey rerun, I'm going to apologize right now if I don't make much sense because another guy on this board and I went out last night and tried to drink all the alcohol in Iwakuni, Japan last night.

That said, if you're on a budget then forget the 351W heads, to make it work, you're going to need alot of machine work and that will be the biggest cost to you.

Contrary to popular belief, your stock 289 heads can be ported to flow quite well. In fact (please don't hate me for saying this guys) the original heads were of such a poor port design that a 3-Angle Valve Job and the port/Polish from a pro (no novice work) as well as some good gasket matching work will net you some very good gains in the top end.

That would be my recommendation for a budget. Also, you get to retain your stock compression ration of 9.5:1 if I'm not mistaken on that year.

As far as the 2x4 setup is concerned, if the motor is staying stock for the most part (small cam upgrade, headers, exhaust) then I wouls want to try and discourage your from using that setup. Small block Fords do not like alot of carburation unless they are heavilly modified and even then, it's easy to over-do it. But I have to admit, 2x4 setups look pretty damn cool so here's a tip!

Unless you have some real experience with multi-carb setups, get a pro to help you out the first time and be sure to watch how he tunes them. If you don't have access to one, dig up a vacuum gauge,a timing light, and a tachometer and I can give you some tips and we'll put it in a different thread. The other thing is as I mentioned earlier, 289's can be easilly over-carburated completely ruining your low-end torque. That would severely suck 'cause that is one of the 289's best qualities. So if you're going to use a 2x4 setup, I would recommend dual 4-barrel 380 cfm carbs (the stock 4 barrel Rochesters) or the 380cfm Edelbrock carbs.

Now I'm going to go throw up and try and get on with my hang-over. Good luck with your project!

[vbrpete]

Originally Posted by GTR2b

351W heads have the same bolt pattern, larger valves, larger intake and exhaust ports and the spark plugs enter the combustion chamber at a more direct angle making them a good (ableit cheap) upgrade for a small block Ford.

Now for the problem... 351W's have a higher deck height that that of a 289-302. What does this mean for you? What will happen is when you bolt on your new heads, your intake manifold will not fit by a little less than about 1/8 of an inch on each side.

The only way around this is to use a 351W intake and mill it down (VERY CAREFULLY) and eventually it will fit.

That's pretty much it. If you don't mind me asking... what year of 'stang is this engine in? You may have other options if you're looking for more torque.

Ummm...I don't want to sound like a dick,but...huh?351W heads are virtually identical to 302s.Put them side by each and you won't be able to tell the diff without sticking a bolt through a head bolt hole.The 351W's deck height is 1 inch higher,but this makes no difference to the heads.Only early('69-'74) W heads had bigger(1.84" intake) valves,and not all of them had them.You MAY be partially confusing the Ws with CLEVELAND heads,which had mammoth ports,2.04" intake valves(minimum)and a totally different intake manifold.No 351 intake on the planet will fit a 289/302,period.It's two inches too wide-dat's a lot of milling.
SO-you CAN put 351W heads on a 289,but odds are the 289 heads you may have are a much better choice due to the small combustion chamber for higher compression.96% of all 351W heads have the EXACT SAME VALVES as 289/302s.No benefit at all,unless they've already been ported-this just saves you time.

[GTR2b]

Trust me, I am most definitely not confusing Windsor heads with Cleveland heads. Those are completely different. Clevelands don't have water jackets in the intake manifold and would be impossible to mate to a Windsor block.

Since it's been a seriously long time since I've owned either motor and they are a little hard to come by in Japan I won't tell you that your wrong about the differences between the heads.

[GTStang]

Originally Posted by GTR2b

Trust me, I am most definitely not confusing Windsor heads with Cleveland heads. Those are completely different. Clevelands don't have water jackets in the intake manifold and would be impossible to mate to a Windsor block.

Since it's been a seriously long time since I've owned either motor and they are a little hard to come by in Japan I won't tell you that your wrong about the differences between the heads.

The taller deck hieght that requires a different intake manifold on a 351W is completely due to the block. Once the 351W heads are put on a 289/302 you can use a 289/302 intake manifold.

Next 351C heads will most definetly bolt to a 289/302(Boss 302). Although the heads requires some maching. Also the intake manifold is solved through one a Boss 302 intake manifold cause a Boss 302 head and a Cleveland are the same casting. Second most common now is intake manifold spacers. Or third maching of a 351C intake manifold. No one bothers to do any of these much n e more because of the plethura of small block Ford aftermarket heads available and can be done cheaper overall.

[HiFlow5 0]

GTStang=God

[GTStang]

Originally Posted by HiFlow5 0

GTStang=God

HiFlow=Mod

[02GTBLack]

Just want to say I put 351w heads an a 74 302 and it was a simple bolt in deal that didn't require much ado. I also looked into the 351c swap for a 351w and it could be done with a manifold easily also needed longer pushrods and a few other minor things. I was goning to use the B&A Ford Track Boss intake. Back to the 289, sounds like you should listen to GTStang. Good luck with the swap.