Re: Compression ratio of 327 head; year of the engine block?

Posted by Highlander160 On 2016/10/16 12:12:15

I always add this when talking about valve seats. DON'T PUT HARDENED SEATS IN A PACKARD INLINE BLOCK. It's a high nickel casting more akin to cast steel than cast iron. Adding valve seats helps the machine shop and if they fail will continue to help it. Worried about valve seat erosion? Run Stainless Steel Valves. All told that's a relatively affordable option to seats and they're not going to fail. There's always the occasional splash of race fuel or lead substitutes (which you don't need every time you gas up) to offer the engine a bit of old school protection. The use of Rotella or similar high zinc oil also goes a long way to keeping things protected the old way. Good luck...