Need help engine upgrade
 

I Have recently purchased a TBI 350 complete with comp, wiring harness and all accessorys out of a 95 Tahoe. I did not however recieve the fire wall port that the wiring harness plugs into. I am installing this into a 76 longbed pickup. Will a incab harness and firewall port from an 87 work or do i need to find one from a 95 or other years that will work? If yall could please give me some info i would greatly appreciate it.

Thankyou any other valuable info you may have in biulding a 76 K25 P/U from ground up i would greatly appreciate it