The World Products are pretty closely priced with the AFR, Edelbrock and Trick Flow heads, have you checked into these others to see if they have any that have the chamber volume your looking for?

 

the roush heads are 500+ for the set vs 1100+ for these others you mentioned. not sure were you get pretty close

 

Yowza, whos selling them for that cheap? Summit has them listed at over 900 a pair.

 

What really. its been while since i looked so maybe the price has changed

 

the roush 200 cast iron version is 939.90 bare, or 1031.90 (summit racing)

 

I believe you may have misread the Summit catalog. The price for an assembled head w/.560 max lift, single valve springs is $939.90. The other is for an assembled head that has a .600 max lift, dual valve springs for $1031.90. Both prices are for an assembled Roush 200 head.

 

woops, your right mako

 

i hadnt noticed that in small *** print it says sold individually. that makes a big difference for sure.

so forget what i said about these heads and get some edelbrocks or afr's.

late

 

I like the aluminum GT40 heads by Ford -Mo- Co over the hot rod after market heads for street driven cars/trucks. Don't think that the GT40Y Turbo swirls or the GT40X heads are just aluminum versions of the mild cast iron GT40 types, used on Lightnings, Cobras, and Explorers. These heads are completely new aluminum designs, that can deliver the same kind of high performance as Edelbrocks, Rousch...ect.. However, these are engineered by Ford to bolt right on late model 5.0 and 351 motors. They don't need special pistons, stud mounted rockers, or special pushrods. They also have thick decks to avoid warping and have plenty of material on the ports. The combustion chambers are a special shape to create a swirl combustion pattern for improved throttle responce and improved combustion. The Ford aluminum GT40's are not as soft on the bottom end as some of the others with more moderate port volumes and higher flow velocities at lower RPM's.

Many of the other aftermarket heads have additional complications. For example, The AFR's and Trick Flow Twisted Wedge give the best flow numbers and the most performance potential, but the AFR's come pre-ported with rather thin port walls. The Twisted Wedges must use special stud mounted roller rockers, guide plates, and about 1/2" longer hardened pushrods, to avoid knocking out the valve guides. These are additional costs. Most of the others, such as the Edelbrocks and the Windsor Jr's are just aluminum versions of 289 heads with larger ports in my opinion. They don't give you the advanced cumbustion chamber designs of the Ford Turbo Swirls aluminums, or the Trick Flow Twisted Wedge heads. The Ford Gt40Y heads come with 64 cc chambers and 1.94 intake valves. The Gt40X has even larger intake valves, and comes in 64 or 58cc chambers. The x heads come close to the performance of the AFR's or the Twisted wedge heads. Both the Y and the X versions can be set up for either stock type pedalstal mount or stud mounted rockers. Just get any Mustang magazine and you will see these heads listed in the ad's. They are very competive in price.

 

Swirl technology has been around since the 80's. I doubt that just Ford is using it. I happen to like the cast iron heads. The reason is if you just happen to overheat, you don't ruin the heads. World products offers cylinder heads in both cast iron and aluminum.

 

Was going to cry foul P51D regarding GT-40's coming close to the aftermarket. Then I recalled the Motorsports 392 crate engine. GT-40 X equipped and 430 hp ready to rock.

 

P51d, the GT-40Y and P versions are both a nice cylinder head, but they fall considerably short of TFS, AFR and Edelbrock in both intake and exhaust flow. I dont think you would go wrong with a set of them, but there is alot more to start with in the others along with additional potenetial for gain. Ive used Edelbrocks and TFS, both with full porting on stroker applications and have had no issues with either set.

 

Hey 94F150. Do you know anything about the Victor Jr's? I'm wanting to build a pump gas n.a. 400 (4.125" x 3.75") and figure the 70 cc's and a big dish are a good combo to keep compression down. Edelbrock states they're intended for forced induction or nitrous.

 

From what I recall on the victor Jrs, they are more of a high rpm style head, I dont know for sure though. They might use a different degree angle on the exhaust manifold too, requiring special headers. This is just what I can pull out of my cobwebs right now, but I'm pretty sure these arent going to be good heads for a truck applicaton with a lot of low end needed.

 

I have used the TFS, and they work fine if you take the reccomended precautions. I have twisted wedge specific pistons so I can use a more radical cam. My point was that particularly the Gt40 X versions are virtually as good as AFR, TFS..ect, but more user friendly on most near stock Ford applications. The Aluminum Gt40 Y heads outperform the cast iron GT40's such as the Gt40P by a good amount. The X version outperforms the Y version yet again, and closely matches the potential of the aftermarket heads. The Y aluminum turbo swirls will probably far exceed the performance needs of a truck motor.