I think the 327 cid was a minimum displacement engine and the max is 358 ci. I think the minimum is higher though, because some of the Ford teams went to smaller motors (331, in the 80's) and started kicking brand x's a$$ (when restrictor plates were used), so Chevy started crying and made a minimum displacement rule.
The reason it works is because the Ford has the Cleveland style heads with healthy ports, canted valves, and the like. The Chevy uses wedge style heads with smaller rectanguler ports (I believe). The Ford is choked more and suffers more from the restrictor plates. The Chevy benefits from more velocity from the restrictor plates.
I believe Bill Elliot was one of the first to try this, because his brother built his engines, and decided to see if this would work.
[This message has been edited by 88GT5.013.02 (edited 02-27-2001).]
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