Quote:
Originally Posted by Oneball
Thanks, there was only one casting number used for the 69 to 70 iron block 427cu and 454cu Corvette and that was 3963512, these are difficult to get hold of especially this side of the Atlantic.
The tall deck blocks are only for trucks as they have a lower compression ratio.
So I could use a later block with a different casting number but I don't know of anyway to prove that these are exactly the same. If the FIA doesn't have a list I can't find a way to do this without building a car and applying for an HTP which could be pointless.
I've had my current historic race car for 25 years and it's becoming less and less fun, it just seems that nowadays there is a requirement to be stupidly rich so you can pay your specialist who knows someone and then you're able to run your McLaren with a modern Dart block or your Mini with a dog box.
Sorry for the rant but I've spent months chasing engine builders, not for advice, but to build me an engine but no one ever gets back to me, even after going to see them and I've just about given up on the idea. Same with other bits of Corvette. I've never come across a marque of car where the specialist are almost to a man completely unhelpful. I just don't get how people can turn down 10, 15 or 20 grands worth of work. Guess I should have got a Ford.
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I would just say that relying on third parties to give an answer is not a way forward. If you buy the books and records of the GM castings, you will find your answer and possibly your needs.
The fact that an engine block is hard to find has never given a way around, which is different to total and proven non-availability.