What heads are these?

Pdandy

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Nov 4, 2019
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I tried looking with all these numbers stamped on the but I can't find which heads they are. There's isn't a cc stamp on them anywhere.

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2000xp8

SN Certified Technician
Aug 8, 2003
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Just call trick flow as mike says.
They will know exactly what they are.
I have called them on multiple occasions.
Apparently they keep really good records.
 
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Pdandy

Member
Nov 4, 2019
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Nebraska
Just got off the phone with Howard at trick flow. He was very helpful. These are 170cc twisted wedge heads. 202 intake 160 exhaust. 61cc combustion chamber. I told him what cam I'm thinking about using and he even gave me a pushrod length and lift of 540-550 with 1.72 rockers. Great customer service.
 

2000xp8

SN Certified Technician
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I'm not so sure i'd take their advice on pushrod length for a set of heads you don't know the history of.
If you are buying rockers, buy 1.6's and use a cam meant for them.
 

Mustang5L5

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Pushrod length can vary if the heads have been milled at some point in their life, or if the block has been decked. This is why I would measure for pushrod length and then order. Head gasket thickness is also a factor.

For example. for the TFS170's I've often heard the ideal pushrod is 6.700-6.750". However, when I measured multiple times, I got a much better pattern, and closer to 90* to the valve at mid-lift with a set of 6.800" pushrods. So that's what I ordered.
 
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