79 Volare
I don't like using silicone on the intake ports, the gasoline turns it to jell after awhile. You need a gasket, most company's tell you use Fel-Pro print-o-seal but I like the cheap Mr. Gasket better. I like using something like high-tack on the ports. I also like using a valley cover-on a SB-to get the oil away from the intake--Summit has them for like $25.
Only place I use RTV is on the ends of the intakes, front and back. Even the water ports I stick with that High-Tack, Edelbrock makes sometime too, Gassalaa--not spelled right.
But many do use RTV ?????? but then they get a lumpy idle after awhile and think its just the cam.