oil pressure sending unit

I recently bought an 80 series landcruiser. When I bought it the owner had told me the oil pressure sender needed replacing. (Hes pretty mechanically inclined and trustworthy, friends with my dad) I just replaced it and the oil pressure gauge still isnt working. When I replaced it I wrapped the...

Installing a small block Chevy engine in a 1971 FJ40. What senders can I source to feed the stock oil and coolant temperature gauges? The Toyota dealer says they’re discontinued, and the auto parts store says they’d need the resistance range to match up.