I use Mobil 1 full syn after break in but I have a full roller setup in my 340 so that zinc additive crap is a non issue for me :twisted:
Also if you haven't done any machine work to the block, go to the junkyard and pull a late 80s/early 90s LA roller block 318 you'll be money ahead that way. Remember a roller cam will bring you into the power curve sooner and keep you there longer then a flat tappet cam will. I'd also use the milodon road race oil pan, it holds 6 qts and sits above the k member (I have one on my 340).
