87 up fuel sending unit in 81 tank

[chebyshortbox65]

Does anyone know if the tbi sending unit will fit the older tank I picked up 2 I have an 81 with a 5.3 swap and am running in the so cal desert I don't think its going ro last long in the summer heat anytime you idle for a few mins the pump starts whining bad because of lack of airflow I assume anyways I know my tank dosent have the tray in it but this is just temparary I don't let it get below a 1/4 tank anyways.anyone know which pump to use to put out the 60 psi?
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