hey bro, just wanted to wish you good luck with your build. i actually have a friend who built his neon all motor... i know it may be a 2.4L block, he may have said stratus or something, with high comp pistons, built head, ecu... everything. when you look under the hood it just looks soooo amazing (and pricey). everybody around here gives him shit about building a neon, but its really badass.
...the only bad thing: he's a ricer too. its a really well built car thats really fast, but it has a massive front bumper, wing.. etc etc. oh well, to each his own.
good luck man.