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By Ratamahata - 6 Years Ago
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Greetings from Argentina... My name is Leandro... Right now I have two projects, a Banger powered 28 Rpu with stock frame, mechanical brakes, 32 heavy axle with reverse spring and some others mods...
I have a 32 PU too... The plan is rebuild an Y-Block... I found a decent USA block C1AE casting I thing HD truck... And another complete engine... The engine arrive in two days... So I don't know well what I buy...
Found a pair of ECR heads too, needs rebuild but it's better than the Argentinian heads...
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By paul2748 - 6 Years Ago
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Welcome - are the heads U.S.A.? Don't remember those particular prefix letters.
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By darrell - 6 Years Ago
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56 truck heads low comp.never had a set.
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By Ratamahata - 6 Years Ago
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Yes... Mine's are ECR-C heads...Made in USA... In Argentina the Y blocks were imported to the 64' I think... Then the Y Block called (Fase 1) was released...
The entire engine was produced in Argentina, only 6.5 to 1 compression in the heads due to the poor naptha in my country...
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By Ratamahata - 6 Years Ago
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Another complete engine with an two bbl style manifold is coming... I know that the block is Argentinian made... But I suspect that the heads would be USA heads.... 
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By miker - 6 Years Ago
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Welcome to the site. I’ve seen your build thread over on the HAMB, glad to see it’s back underway.
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By Ratamahata - 6 Years Ago
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Yes Sr. Thanks for the reply....
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By Ted - 6 Years Ago
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Welcome to the site.
If the ECR heads have the sodium filled exhaust valves, then it’s highly recommended to replace those. The sodium tends to eat the valve stems from the inside to outside and causes considerable damage when the valve heads separate as a result. My own fix for those heads that came equipped with sodium exhausts is to install new guides that downsizes the stem size to 11/32” where a conventional exhaust valve can be used.
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By Ratamahata - 6 Years Ago
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Ted (10/25/2018)
Welcome to the site. If the ECR heads have the sodium filled exhaust valves, then it’s highly recommended to replace those. The sodium tends to eat the valve stems from the inside to outside and causes considerable damage when the valve heads separate as a result. My own fix for those heads that came equipped with sodium exhausts is to install new guides that downsizes the stem size to 11/32” where a conventional exhaust valve can be used.
Many Thanks for the advice Ted... I'll look carefully... It's seems you're Right because the valves looks very stuck in the Head, At some point the heads would stayed outside...
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