I sure would like to see a valid explanation for this problem, I know it does not happen on every S10, as I lowered several that dont lean at all, including my 96 with a 4/4 belltech drop, it is dead on level with no spacers, and yes, it has a gas tank. Does Belltech have an answer?, as I see this question a lot on several forums. Why dont all S10,s lean after lowering? I know it is important to locate the coils with one drain hole covered in the lower A-frame, and one open, also the coil must locatewith the flatter end up. I can see that if this was not correct, the truck will lean, but why is the lean almost always low on the left?? I have seen one fix that works, shorten the tube link on the stabilizer bar on the high side about an inch. The rear can be fixed by cutting the block down on the low side.