With fuel injection, you really need a baffled tank to prevent cavitation. You would need an El Camino/Caballero tank for the injected 4.3 V6.Thank you. I'm going to try and use the tank I have. It's a spectra tank made to fit the El Camino. I put it in new in 2007. It doesn't have many miles on it, so I'm going to try it. I'll share what's going on with it and if you can help me that will be much appreciated.