Cool that's what I thought.
Head work...well I'm an old school bug (aircooled VW) machinist and engine builder
Below is what I have done so far, I still have to do a light flycut.
The heads actually have decent guides but need new valves. I could toss in new valves, TI retainers and be done.
But....I've cheated a bit and have totally spec'ed out a set of Xtreme heads. I totally know what they use for springs, retainers, valves etc.
I wouldn't do as "xtreme" but I could easily step up to SS valves with 8mm stems, clean up the ports a bit and so forth.
Yes, it would cost a bit more, but not much, my labour is free and I have the tools.
Just wondering if it would be worth it? The 8mm stem valves alone is a greater weight reduction than just TI retainers.
Because I'm a bug/type 4 guy I don't have much faith in sodium filled valves.