TheHEMI.com

STP still is a very cheap form of zinc to add to oil, also your valvoline racing oil is loaded with zinc, I just got my new 354 cam from Iskenderian and it says the best oil with zinc they have found is Brad Penn oil (formerly Kendell oil) Brad Penn I have found is really, really inexpensive compare...

I am new to this board but I saw Scotts posting on 331 cylinder wall thickness, I took a 56 Industrial 331 to a machine shop yesterday to have the cylinder thickness checked in order to bore it out to a std bore 354, instead of an actual sonic check the machinist used a special long reach micrometer...