Back To The Future
Arias engines are famous for having big-block Chevy bore spacing (4.840 inches, to accept common crankshafts) while incorporating Hemi designs. Here, the cast Arias Hemi heads (specific to the 10-Liter engine, interchangeable with no others) are based more on the 392 examples, rather than 426 heads that are more notorious for valvetrain geometry issues.
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