medhat68 is correct I have a 67 that I used the petronix it worked great you will still use the stock body and cap. it will have 2 wires coming from it instead of one.Also on one of my other firebirds I have a MSD stock replacement it does use the factory cap and sits like a original it isnot cheep. but it does perform well.So my advice if it is a point issue only go with the petronix. If you need more spark(as in a built motor)I would go with the MSD.I never had anyone know it isnt stock..