I use the Comp Cams break in additive in all my cars. The added ZDDP is not supposed to be required for roller cam cars but I play it safe and use it for all the old cars. In your case since you are most likely running a flat tappet cam I would always add ZDDP unless you buy a racing oil. Right now I am using 10W-40 Rotela Diesel oil with the Comp Cams additive.
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