Re: 320 v8 pistons and valves.

Posted by Jack Vines On 2020/7/16 15:39:57

It's probable your piston and valve damage was caused by the valve spring retainers. Packard Engineering learned through failure analysis the retainers were too soft and the keepers would pull through the retainer, dropping the valve into the cylinder.

Later retainers are hardened, so replace all of yours with hardened versions.

Are you going to replace all the valves or only the damaged ones? New valves have gotten really spendy, so if you only need a couple of used valves, some of us here can probably come up with them for you.

Some claim to have bored the 320" to 4" and used 352" pistons, but I've never done it. Again, I could come up with a used set of 352" pistons for cheap.

jack vines