having problems with a 440 wedge just gets hotter etc .Have replaced blocked radiator with cross flow type , no change . Waterpump , iron curved impellor fittel paddle type , no change .Thermostat or not , no change .
I recall there was a guy here who plugged or reduced the size of the bypass port in the waterpump housing . Am I correct ? It does have a aluminium housing
Motoris a bit of an unknown , maybe 11:1 , eddy heads . Does only have 17deg BTDC , probly a bit low but should not be that far off , may need 20

Thoughts ,
Tex