
I used to use Kendall GT-1 10w-40 in my 72 LT-1 motor after I rebuilt it waaaay back in '77...
That oil, from the link, seems to be a one stop shopping...no ZDDP from Kirban mixing with the syn oil of your choice. It's "in there" as they say! Or at least it appears to be all that flat tappet motors need in one package???
Thanks again!