Quote Originally Posted by Dr Terry View Post
AFAIK there was no factory coolant overflow bottle, in any HJ or HX.

The first 'overflow bottle' from the factory was the A9X (mid-77) Then any HZ with factory A/Cond or any HZ One-Tonner.

Dr Terry
Hi;

I have a 5/79 build 5.0 / T350 which was also optioned with a Heavy Duty Radiator (but not A/C); it has the overflow bottle.

I have noticed that bottle on other latter built HZs, 6 & 8 without A/C.