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As far as your stereo, I can't answer that - most who've posted about that have said no, it doesn't. I suppose the power requirements of the system would determine that.
I've done two of these so far with no problem by having the hub turned back to accomodate the 3mm-thick oil pump spacers that come with the timing set. Dimension "A" in the pic below must be increased by at least 3mm (0.118"). Go to 0.130" to be sure. I've turned it more than that but it's not necessary.
I've put the slp double roller timming chain on and there oil pump, used the spacers they provided, and no clearance problems,. Didn't touch my under drive pully at all. If you have guestions call: Joe jill at Superior Automotive
in Anahiem cal. 714-503-1880. They did my H/C for me.
That's true andreas, some have. But others have run into interference with the setup. I suppose you could wait 'til you have it all apart and try it but remember that you have to press the pulley all the way on to find out if you have interference or not. Ifyou do turn it, have it done on a lathe in a machine shop and tell the machinist to indicate off the hub surface - not the outer pulley rib area.