I know that it may feel like opening a can of worms but it is worth checking the cylinder compressions. If a de-coke is required or the valves and seats are a tad moth-eaten, then being OHV rather than OHC or DOHC, it's a relatively easy exercise to remove the head. And there are enough specialists who can convert to lead-free.
Of course once off, you could get it gass-flowed to gain improved performance or even go one stage further and dump the cast iron head for a nice CNC machined and ported aluminium cylinder head.
Last edited by Cheshire_David; 10/05/14 07:23 AM.
