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Original Message
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| RE: Identification |
| By John Saxon - 08/24/2002 2:10:50 PM; IP 167.147.240.2 |
| Timothy if you still want to invest some time trying to find a good block for boring to 428 possible candidates are heavy duty truck blocks from the mid 60's up to mid 70's and some industrial blocks the earlier blocks will be hard to distinguish from the regular passenger car blocks casting # wise but the later ones have the mirror image 105on the left front corner and will have a D3TE or D4TE casting # earlier blocks with extra main webbing and a large distibutor pilot hole indicate truck application.Before spending money on sonic checking a block knock out the center freeze plugs and look for the # 428 cast inside the water jacket if it is there It is almost a sure bet it will bore safely if not you can still use that old trick of sticking different size drill bits between the cylinders I don't remember the sizes off the top of my head but I'm sure someone on the forum does if not I can try to dig them up.This wil give a rough indication of water space between the cylinders which will indicate thicker or thinner cylinder walls.A block passing this test will also be a good candidate for sonic checking.There are quite a few blocks out there that will bore safely but it would be cost prohibitive sonic test the number blocks necessary to find one these tests will narrow the field considerably.A while back one of the magazines did an article called the poor mans 428 and they ended up sonic testing like 9 or 10 blocks before they found one that would go out that far but I don't think they used the tests to narrow their search.So if you are inclined to scour the wrecking yards and engine rebuilders core piles you should be able to find one it is just a matter of whether it is worth your time and effort. |
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