On another car of mine I replaced the tank with a Spectra, and was happy with the tank. Although the factory sending unit was working fine, I decided to replace the sending unit since it was 30 years old and I was dropping tank anyway, so got a new Spectra sending unit. It never worked right and I wished I had left the factory one alone or located a NOS one. Afterwards, I read a lot of feedback the Spectra sending units were hit and miss.