I have heard of fitting and other problems with these and other remanufactured units, like the 250 HEIs.
I'm not sure if Tom sells them with customized mechanical advance.
The Mallories have adjustable mech. advance, without taking it apart.
Since I don't have the original or a NOS dizzy, I rather start with a new manufactured unit, since I will use it for decades daily.
Everything else on the engine is also new or NOS, for the same reason.
