I have a stock 103 in my Street Glide with heavy breather and full Vance and Hines exhaust. I am looking at putting some cams in it soon, what sort of difference would these heads make. 

what state are you in

Still got these mate looking for my night train 

If I had the 750 I would jump on them :(

Great heads.. couple smart fellas in the game from SA told me to use em on my 107 when built cause they work well. Glad I did I tell ya.

Look forward to getting them thanks mate