Hi Room - Have a 350/330 SBC crate motor - vortec heads,etc. What reach and heatrange of spark plugs are recommended for this motor? And what brands are on top these days? Also what oil pressure sending unit do i ask for? I've purchased 2 already and they are multi-wire units. The Highway 21 wiring kit I have calls for a single wire unit. Parts stores don't know what i'm talking about! Many Thanks for the help,Charlyg!