351 4v heads

[burbygurby]

I have a 351 4v and had the engine at the machine shop getting cleaned and fixed up and they called my saying the heads are in pretty bad condition and they didn't recommend using them as it would take a lot of work for an okay job. I have been looking into other options and am just looking for suggestions. I don't really care to buy new stuff or an original and fix it up again but i have already bought most of the parts for the heads i was going to use so something that would fit those parts would be best...4v edelbrock air gap, ferrea valves (2.07/1.650), original rocker arms, flat tappet cam. I was originally planning on building the engine to around 400hp so I don't need any crazy super high tech stuff but I also don't want the worst things there are. Thanks!

 

[will e]

What do they think is wrong with them?
What parts do you have?

 

[burbygurby]

"4v edelbrock air gap, ferrea valves (2.07/1.650), original rocker arms, flat tappet cam" those the parts I got. They said there is some pretty badly pitted spots from rust and there are three hardened seats in it already and we don't know the quality of the last job but he doesnt want to take them out to go bigger and possibly hit the water jacket. and I was going to have it milled a bit to raise compression but they have been previously milled too and they did a pretty wack job so he didn't know how good he could make it.

 

[will e]

Sorry, did I miss that list in the original post? That's a decent set of parts and a good reason to keep with the 4V. An original set isn't impossible to find although a quick search shows they can be a bit 'pricey'. I can't help with what aftermarket might work. When I was searching for a set of 4V heads I don't recall many aftermarket options but it has been years.

The next question is how big of a rush are you in? If you want to get this done now you will probably pay a premium for heads but if you are willing to sit back with some cash a deal will eventually come along.

 

[burbygurby]

I’m not in too crazy big of a rush but I would like to have the engine complete before the summer cause the body work is being completed right now so there’s a possibility it is drivable by then

 

[Hemikiller]

Did the quote to do the needed work reach near the cost of a set of aluminum heads? A set of Edelbrocks or Trick Flows will be around $2500, and they should be checked out by your machinist before being installed. I'd recommend you stay away from Speedmaster/AT Racing world and any of the other budget offshore cast heads.

https://www.summitracing.com/search...ding&N=brand:trick-flow-specialties_edelbrock

 

[Omie01]

Also you did not specify if you need open/closed chamber heads. Do you know which you have? I have a set of bare "N" heads Closed chamber I can part with. Let me know if you're interested.

 

[burbygurby]

They were open chambered I would be fine with closed but would they fit my valves, I don't know all the different measurements. What woudl you be asking

 

[burbygurby]

And what does the "n" mean

 

[detritusmaximus]

And what does the "n" mean

I think the N heads (D0AE-N?) are 70 closed chamber with 2.19 valves.

If you have open chamber 4v heads with 2.07 valves, they are probably late 73-74 heads (4v ports but 2v valves sizes).

 

[Omie01]

Yup, 1970 heads, 2.19 IN. 1.70 ex. If you want them I would let them go for $500

 

[MOTORCITYBADBOY]

I’m not in too crazy big of a rush but I would like to have the engine complete before the summer cause the body work is being completed right now so there’s a possibility it is drivable by then

Here's some heads.
https://www.speedmaster79.com/Ford-...cc-Hydr-FT-Complete-Aluminum-Cylinder-Heads_2

 

[Spike Morelli]

DO NOT BUY ANY SPEEDMASTER PARTS........EVER

 

[Ryunker]

I have a 351 4v and had the engine at the machine shop getting cleaned and fixed up and they called my saying the heads are in pretty bad condition and they didn't recommend using them as it would take a lot of work for an okay job. I have been looking into other options and am just looking for suggestions. I don't really care to buy new stuff or an original and fix it up again but i have already bought most of the parts for the heads i was going to use so something that would fit those parts would be best...4v edelbrock air gap, ferrea valves (2.07/1.650), original rocker arms, flat tappet cam. I was originally planning on building the engine to around 400hp so I don't need any crazy super high tech stuff but I also don't want the worst things there are. Thanks!

What your Machinist is unaware is that replacing the heads are a fortune out of pocket since they will need to be gone thru anyways.

Having them go thru your heads and fix them is the best and most economical way and yes repairs are likely to run 1k by the time they are done. Been thru this and that is the hard truth.