@VolvoHordz I ended up buying two sets of the VS1632 springs for a decent price - somewhat less that Yoshifab was asking at the time. Well that, and the goals for the car changed - it was going to get some crazy Cat cams, but it's likely now to get Cat cams which are someone more sane and which don't require solid lifters, etc.
Which reminds me - it's about time I sent at least one of the heads away to be tanked, machined, get the new valves and guides fitted, and reassembled. Project Clyde has stalled a bit, with everything else that's been going on.