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Are your heads the Pro1 design? Forgive my ignorance, I wasn't aware that the pro1 cam with a 59cc chamber...unless you had then milled. Are these plugs the gasketed design?
Are your heads the Pro1 design? Forgive my ignorance, I wasn't aware that the pro1 cam with a 59cc chamber...unless you had then milled. Are these plugs the gasketed design?
Pro 1's are the only ones to fit an LS motor. Combustion chamber size unmilled is 62cc.
The Darts were designed for gaskets, but others have used tapered. The link I posted in your other thread had a full discussion including input from the guys at Dart who designed the head.