Picking up my stage 1 kit in a couple weeks or so and I've been sorting out some details getting prepared for various things. I am planing on installing a GM Performance LS3 E-Rod 6.2 with a TKX 5 speed. It requires a full evap system be used incorporating a purge valve and a factory style vented gas cap. No vent valve on the canister I don't believe though. Does anyone know if the cap that comes with the kit for the tank is vented as such and will comply with what the install directions require? The engine comes with its own canister. It also says you need to have a vapor dome at the top of the tank that equals about 10% of the tank volume for vapor recovery without sucking gas into the canister. Any advice on this would be much appreciated. all this to use a crate engine in Mass.