Re: New block, a further discussion
In the SCTA the oem blocks applies only to vintage engine classes and the fairly new iron roadster class. All "normal" engine classes that are simply cubic inch ranges you can do anything you want. It could be your very own design engine whittled out of a solid block of metal. All they care about is the cubic inches.
There are three main vintage engine areas:
- V4F/V4 - pre 1935 4 cylinder
- XF/XXF - Ford flathead V8 up to 325 cu in
- XO/XXO - inline 6 (pre a year I can't remember) and other brand flathead V8
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