300 at front wheels is ok, just uprate your brakes with the 312 conversion...i run 300 on my vento owith stage 3 , but thats soon going to be more with charge cooler and meth set up vortechs are pretty easy to get hold off, you look after them and they last long i reckon you could do it for about 3500 with a few other mods , cams , exhaust ect