Hello all. My first question

My engine is ready to go to the machine shop to get a sleeve fitted in one of my cylinders - the other 7 are fine, but this one has a nice gouge in it. Whilst it is there it is a good time to get some other work done.

I am confused about what needs to be done to convert my '67 326 V8 to run on unleaded fuel. The plan is to use the car as often as possible, but not race, so I'm thinking it is worth doing; economically (avoid continual use of additive) and otherwise.

I've been reading around, including searching this site for some answers, but I am no more clearer about what I need done...

I have read the following is needed (one or a combination of...)

• hardened valve seats
• non-magnetic valves
• unleaded valve guides
• probably something I've forgotten
• or nothing, it'll be fine as is...

My machine shop said it could be fine to just use additive, depends how much use it will get. To convert, they suggest all is needed is hardened valve seats installed, but they say intake and exhaust both need to be done as there is so little space between the two. They did say the old valve will be fine. This contrasted what I've read in a number of places about non-magnetic valves (also, another machine shop suggested these) and replacing the valve guides.

Would it be possible for someone to clarify what work I need to get done in order to convert my old engine to run on unleaded fuel?

Thanks so much for your help. I really appreciate it.