The Ford Barn

rotorwrench · 08-19-2025, 03:46 PM

The OP states he has NOS EAB heads. I've seen new heads back in the day but I've also seen misrepresented ones too. Make sure the bottoms of the coolant exit ports have a fair clearance to the deck surface. I've seen them shaved all the way down to the coolant port bottoms.

The Ford pistons with a Merc crank as was mentioned, is another problem. The Merc piston pin bores are a good bit lower on the piston to get clearance right for a 4-inch crank.

Block deck height is another thing if they've been shaved too much.

08-19-2025, 03:46 PM	#22
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,007	Re: Piston hitting heads! The OP states he has NOS EAB heads. I've seen new heads back in the day but I've also seen misrepresented ones too. Make sure the bottoms of the coolant exit ports have a fair clearance to the deck surface. I've seen them shaved all the way down to the coolant port bottoms. The Ford pistons with a Merc crank as was mentioned, is another problem. The Merc piston pin bores are a good bit lower on the piston to get clearance right for a 4-inch crank. Block deck height is another thing if they've been shaved too much.