chevy engine question?

Yes, but not as is. If you use just intake

The angle on the 4 center intake bolts changed in 1987 and up.

You will need to enlongate the 4 center bolt holes in the intake before itwill bolt on.

If you us the '90 heads and intake you dont have to worry about above. They will bolt on fine but...

Then you will need all the '90 350's sensors, engine bay wiring, computer, dizzy, etc

You will also need a high pressure in fuel tank type elec fuel pump.

I would say no because the 90 model of the 350 used a different style engine block than that in a 78 model of the 350 engine...

Different generation blocks. No.

IDK but you also need the harness and the computer and all the sensors, electronic advance distributor, scanner connection and dashboard check engine light ,etc.