Found my dads original 1971 duster!

dads71 said

Ya. I didn’t know what should even come with it when I picked it up. He just gave me a folder that had the sheets in it that I posted on here
I’ve emailed them very politely, asking about warranty and availability of my full dyno information. Including the temperature spike
They have a long standing good name in the industry. So at this point, all I can do is have faith that everything will be ok

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My 2 cents. Rather than getting stressed out and loading weapons, communicate with them as you say that you're doing and get a better explanation that you completely understand. You admittedly don't understand engines, so you should do your due diligence to find out exactly what "blockage" is referring to and what caused the problem with the head. Emails are great because that's a document but actually being face to face for the explanation considering the money spent is imperative.