What heads are these?

[Pdandy]

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.

 

[96pushrod]

Valve size? As cast?

 

[CarMichael Angelo]

Here's a thought....

Since you know they're trick flow heads,....why not call trick flow to answer that question?

 

[2000xp8]

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.

 

[Pdandy]

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]

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]

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.