It is interesting that you mention the gas tank when using OBDII motors. I have done 4 OBDII conversions without the tanks and had no problem getting them certified. I have heard of some people running into this problem though. Wonder if it is dependent on the ref? The Chevy tank does have a fuel level and fuel tank pressure sensor in it. Both these signals can be programmed out of the computer so that no DTC comes up. I guess calling the C.A.R.B. would be the best place for a correct answer. The fuel tank pressure sensor can be installed into a toyota tank though.
