'96 vs. '04 IAC & EGR Valves ????

I just put an '04 engine in my '96 GT. I re-used my '96 throttle body, IAC, TPS, EGR.

Can I use the '04 IAC with my '96 computer/harness? Where do I find a IAC gasket?

Also, could I use the newer '04 EGR valve with the '96 computer/harness?

In both cases (IAC & EGR) they appear to be different between '96 & '04

Thanks!