Hi guys i have a stock 69 dzmotor. What spark plugs are you guys using cant find r43 any suggestions. Also what oil are u using. im also going to replace cam .springs lifters pushrods any ideas thanks for your help
43's are way too cold for normal street use anyway; I run AC 45's (R45S) in mine - that same heat range equivalent (Autolite 86, Champion RJ14YC, etc.) in any other plug will work fine too. If you have the OEM "30-30" cam and stock valve springs, any CJ-4-rated diesel oil (like Shell Rotella, Mobil Delvac, Chevron Delo, etc.) has adequate ZDDP; the brand doesn't matter, as long as the API Service Category is CJ-4. If you go with an aftermarket cam and stronger valve springs, you'll need an additive or a ZDDP-fortified oil like Brad Penn, etc.
Are you sure these oils have the ZDDP? I heard the Diesel oils had the zinc dropped also.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B