Which Fuel Pump/Sender Unit

[EXI Turbo]

Ever since I can remember there has been a smell of petrol coming from the unit where it attaches to the fuel tank.

I have removed it numerous times and tried to seal it with every product I can find on the market but to no avail. It is now getting worse and I think it may be the unit itself as the petrol seems to be sitting on it rather than the fuel tank as you would expect if it was the seal between the two.

I have now decided to replace it but wondered which one I should be using. I currently have one from a 1.6L rover 400 but as I have the 2lt turbo lump fitted was thinking I might need something with a bit more oomph.

Any thoughts/experience ?

thanks