I'm new here but have been a 3gen owner for 4 years now i
have a 1987 firebird 2.8mpfi changed out the dash to a 89 (with the tach temp oil ect.)
didn't change the wiring just fiber glassed in the old cable spedo
On to my question how do you get the temp and oil senders to work
do i need to rewire them or change the senders themselves?
pardon my ignorance and thanks in advance

 

Replace your sending units. Here is a link that will explain further.

https://www.thirdgen.org/gauges

 

Well that would work if the connecters where the same
but sadly they are not also the camaro is completely different cluster then
the firebird i took apart my 84 camaro cluster a bunch

 

Still same basics. You will have to replace sending units. But do a search on it. A lot of good threads out their to be read.