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Discussion Starter #1
Hi,

I recently bought this shortblock:

http://forums.vintage-mustang.com/mod-custom-forum/623522-good-deal-408w-shortblock-2.html

Now I am looking for a set of heads. The pistons in the shortblock are not TW specific, but I am not opposed to notching the pistons if it would only be about $50. I found a set of Twisted Wedge 205's advertised for $1500.

Intake Valve Size 2.02
Exhaust Valve Size 1.60

CFM Flow Intake/Exhaust/Ratio
.200: 144.4/105.2 72.9
.300: 216.7/137.1 63.2
.400: 267.8/1.72.2 64.3
.500: 297.9/194.5 65.3
.600:314.3/202.5 64.4

New 195lb Beehive valve springs
New Titanium Valve Spring Retainers
New Valve and seals
Can pistons be notched inside the block or do they have to be disassembled and done separately? Would it be best to buy a set of TW pistons? Which ones fit the 205 heads? I am looking on Summit and some of the pistons are for the "514" head. Which head is the 514 head?

I get a little overwhelmed with engine parts. They all have to fit together perfectly and this is my first build. What other things do I need to consider?

Thanks,

Justin
 

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Its fairly easy to notch them in the block. See if you can chase down a lindy or isky notcher or if not make one yourself out of belt sander paper and an extra valve. If you intend to run a cam that will take full advantage of the heads and the 408 you've got some cutting to do.
 

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The Twisted Wedge 205's are a great choice for most 408w builds. They have the needed cross-sectional area to support that many cubes and the exhaust ports are stock location which makes header selection much easier with our classic cars.

The heads themselves sound like a decent deal. A large part of how good those heads are will depend on the valves they used and the valve job that was performed. A junk set of valves is just that, a junk set of valves. They are not as durable as a quality set of valves like Ferrea valves and can actually cost you flow due to the stem and radius on the backside of the valve. A bad valve job can also kill flow. Also, depending on the camshaft you run you may need different valve springs. Just another expense you need to factor in. Titanium retainers are a $200+ option themselves so if the heads are in good shape and built with quality componenets then it is probably a pretty fair price.
 

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I think those "bargain" heads might cost you in the long run.
While cutting piston notches in an assembled shortblock can be done, it is not super easy.
I would buy the AFR 205s if it were me.
 

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I would buy the AFR 205s if it were me.
AFR 205's are not the same size head as the Twisted wedge 205's. The Twisted Wedges have a shorter intake runner because of the altered intake valve location. AFR 225's are a better comparison. The problem with AFR 205's and 225's is the larger 2.08" intake valve. Since the valves are of the stock, inline variety the intake valve is shrouded by the cylinder wall on small bored blocks (4.060" and smaller). They work well on aftermarket blocks with 4.125" bores but not on the smaller bores. The flow numbers they give for these heads is for a large bore, and do not flow those numbers on something with a smaller bore. IMO its worth the effort to use the Twisted Wedge heads as they are a better designed head.
 

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Discussion Starter #8
From the seller:

CFM Flow Intake/Exhaust/Ratio
.200: 144.4/105.2 72.9
.300: 216.7/137.1 63.2
.400: 267.8/1.72.2 64.3
.500: 297.9/194.5 65.3
.600:314.3/202.5 64.4

New 195lb Beehive valve springs
New Titanium Valve Spring Retainers
New Valve and seals

Now that I am looking at the prices of new TW 205's, $1500 for used, rebuilt heads doesn't seem like a super deal. I wouldn't mind paying an extra $500 to know that I am getting brand new heads with a warranty.
 

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Now that I am looking at the prices of new TW 205's, $1500 for used, rebuilt heads doesn't seem like a super deal. I wouldn't mind paying an extra $500 to know that I am getting brand new heads with a warranty.
Exactly my thought when I bought my new tfs. If you're looking in the corral those guys sure are proud of their stuff and expect to get near new prices for it.
 

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The Corral has been my main source for looking for these heads. I don't bother with Ebay and Craigslist always has the smaller 170 heads, if any. There seem to be pretty decent deals for other things, but you are correct; people want to get the MOST out of their used heads.
 

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Now that I am looking at the prices of new TW 205's, $1500 for used, rebuilt heads doesn't seem like a super deal. I wouldn't mind paying an extra $500 to know that I am getting brand new heads with a warranty.
Talk to Total Engine Airflow in Tallmadge, Ohio. They do the CNC porting program for Trick Flow and are in the same building. They can set you up with a set of new heads and the springs you need for your camshaft. Their prices start at $1975. Unless you are going mechanical roller I dont believe their should be a price increase from that for springs. They are great to work with. This is who I have do my cylinder head work.

Total Engine Airflow
 

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I've seen TW205 head with titanium valves and retainers on there for about that price. The valves alone are about the price of the heads. Unless the rebuilt heads came directly from a reputable rebuilder like TEA (and are CNC'd), I'd probably pass.
 
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