actually the MegaSquirt wasnt hard to install at all...no harder than say a SAFC...although now that I have switched to an SRT engine with the NGC crank trigger I have to convert to EDIS4 which is a little more wiring intensive but still seems pretty straightforward, the hardest part is actually figuring out a way to mount the trigger wheel, or rather finding one that is easier to mount to my pulley than my current one...which seems to be made of powdered steel and cannot be welded...but anyway, I guess its not too much more expensive than an AEM...but ouch, thats $1500, hope the thing has decent resolution