history · FF-0401

Why are the intake passages trimmed off on some ARDUN blocks?

It is a Don Ferguson signature. Steve says Don's team put this block together, and Don told him that a block with the intake passages trimmed off is probably one of his. The habit goes back to Don's father: with big hands it was hard to reach into the valve area, so the passages were trimmed. There is no functional reason for it.

Expert

Steve Coppock

Evidence

expert attributed

Component

trimmed intake passages

Applicable scope

Flathead blocks built for ARDUN heads by Don Ferguson's shop