No I havnt auto-x’d, But although it is a form of racing you dont need power to do well. So if you were to build a dedicated auto-x car then you obviously wouldnt opt for an lsx. Uneeded power, uneeded weight. Compare that to a touring, dift or drag car and that 126 lbs extra of an LSX wouldnt be as big of a deal when you look at the stock power, potenial power and reliablity it brings with it
Still if anyone here’s racing competitevly enough to be contemplating an LSx Vs. an extra 126 lbs, I’m pretty sure what we say isnt going to make or break their decision. 400hp out of the box that gets 26+ mpg, incredible reliability and cheap bolt-ons sound good to me for a street and/or track car.
Edit: Also I didnt say an Ls1 would give you 50/50 weight dist. A 240 dosnt have a perfect W/d to start with, but im sure you can manage to atleast keep the w/d with an LSX without cutting the firewall or doing any major fab work.