Only 6 engines later than this one in our directory.

[chrisnoel]

http://www.ebay.com/itm/Honda-CB-1969-cb-750-tested-running-sand-cast-motor-with-working-4-cable-carburetors-/251636090981?forcerrptr=true&hash=item3a96ae0865&item=251636090981&pt=US_motorcycles

I only see 6 later SC engines than this one in our directory.  I'd take a stab at less than a couple dozen in existence perhaps. 

[chrisnoel]

Bout hit buy it now on this one myself till I realized it was in Ohio.  Might not be a bad buy for a sandcastonly member in that neck of the woods.  Most likely not the original head though as I'd expect a sandcast head on this early of a Diecast motor.    

http://www.ebay.com/itm/1969-Honda-CB-750-Engine-Motor-K0-CB750-K1-K2-550-350-/221550366787?pt=Motorcycles_Parts_Accessories&hash=item33956e5043&vxp=mtr

[kp]

Head is certainly not correct but the early cam cradles are the real meal deal