yes they will fit, but you will need an intake manifold compatible with vortec heads if you plan on reusing the carburetor
will 1995 Chevrolet 350 intake fit a 1997 vortec heads
Yes they are the same.
no sorry they are cast iron.
to replace the intake gasket would be about 4 hours labor. parts would run about $50
Heater return pipe or hose, leaking intake manafold gasket.
Check the pressure regulator, fuel filter and fuel pump.
here is a link to a how to thread that will have what you need. http://helpwrench.com/forums/showthread.php?6-4.3-5.0-5.7-Vortec-Intake-gasket-replacement-guide-pictures-directions-and-pic
vortec 454,1996 thru 1999-->>>290HP 410TQ
1.8.4.3.6.5.7.2
YES it is.
NO. The intire fuel system, Heads, Intake and valve train / cam and lifters are DIFFERENT.
A vortec 5.7 is a lt1 based engine.