Standard mfi pumps are well up to the job mate, people use them for well over 200bhp,

As said above i would check the gauge sender is the correct jobbie, they are colour coded.

The metal header tank will have nothing to do with anything, but check/replace the header tank cap (cheap), replace the thermostat, check your fan is cutting in etcetc, usual stuff really, bit suspcious about your heater being cool though, i remember mine being really good....

Then take it to some one for a good set up, you will be amazed at the difference this will make, will sort your starting issue out too.


Good luck!

Rob,