AFAIK, XE19xxxx blocks were built at Geelong and didn't have 4 bolt mains. In fact I think they may simply be the blocks as used by any Aussi Clevo Falcon, they are stronger than the US Clevos though and in US terms would be quite rare.
(1) all 'proper' NASCAR blocks were 4 bolt they all had the XE 19 XXXX casting number number. The one in the EBay ad may have been one that was rejected before they put the main caps on it.
(2) the ones released into circulation were rejects from QC .. but that didn't mean they weren't any good.. just failed some test or another. The one I had years ago was from a Bronco of all things.
(3) They were NOT the 'aussie' block that people spank themselves about..some people think that the late model blocks were all NASCAR blocks. The standard aussie block had the conventional casting number system.
(4) NASCAR blocks weigh heaps more than a normal cleveland block.. with siamesed bores and thinker pan rails etc.. it all added up.
(5)They could be safely bored out to 120 thou, try that with a standard block !
(6) I was the biggest tool known to man for getting rid of it.
I have a 4 bolt main block in my XE ESP. When I bought it, they mentioned it was a Nascar block (didn't really bother me at the time). It definately is a 4 bolt main, and is the factory block. Any idea how I tell if it is a Nascar block or not?
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