I've taken most of the intake and exhaust apart on my 505 wagon due to persistent idle issues and to replace the timing belt, found a huge intake leak that's the likely culprit, wondering whether to rebuild it as is, or switch to megasquirt fuel injection and get rid of some of the vacuum piping all over the place. does anyone have experience with aftermarket ecu's on these engines? is it worth it? engine is at ~350,000 k'd so don't really want to put too much money into it, but I do so enjoy driving it, and maybe the extra reliability is worth it?