lots of options,..can lock out the advance on regular dizzy, pay them to,.. buy theirs and probably few other aftermarket options to! i like this system cause its put out buy the engineers that designed the GM TBI's to start with and use OME parts that can be bought at any parts store and your hand held OBD code scanner can do diagnostics on it! i run carbs my self, only injection in my drive way is a BC3 cummins in a peterbilt, but it dam sure dont got no computer controls ether!!
