It works alright... I'm still hunting down a noise problem which causes tach spikes. I've tried just about everything - playing with those resistors, running a line of coax in an attempt to sheild the line from ignition noise, trying different code, etc... The only thing I haven't tried yet is to cut off the stock ECU off from the crank angle sensor entirely, but I would need to get an 8 volt regulator first to power the sensor.
Try the Opto circuit first, if that doesn't work then try the VR.
