I saw these on Ebay? Has anyone heard of these before?
If so are they really beneficial?
This is a set of Australian Cleveland Heads. These feature the Port and Valve size(2.04" x 1.65") of the US 2V Heads and the 'Quench' Combustion Chamber(59cc's) of the US 4V Heads for the best of both worlds. You get instant response AND increased torque and power thru out the rpm range. Bolting a set of these on your anemic 351M or 400 will increase the compression 1.5 pts and will really wake these engines up, especially in a Truck or RV application. All stock parts ie: Intake Manifold, Carb, Exhaust etc will bolt right up to these. Heads have been baked clean and magnafluxed OK. Just unbolt your Heads and disassemble, transfer the ValveGear, do a Valve Job, bolt them on, and see how you're engine SHOULD have run from the beginning!
If so are they really beneficial?
This is a set of Australian Cleveland Heads. These feature the Port and Valve size(2.04" x 1.65") of the US 2V Heads and the 'Quench' Combustion Chamber(59cc's) of the US 4V Heads for the best of both worlds. You get instant response AND increased torque and power thru out the rpm range. Bolting a set of these on your anemic 351M or 400 will increase the compression 1.5 pts and will really wake these engines up, especially in a Truck or RV application. All stock parts ie: Intake Manifold, Carb, Exhaust etc will bolt right up to these. Heads have been baked clean and magnafluxed OK. Just unbolt your Heads and disassemble, transfer the ValveGear, do a Valve Job, bolt them on, and see how you're engine SHOULD have run from the beginning!