I would add 1.6 roller rockers to the list if just a top end build.Mike, if you're sticking with the stock rotating assembly, you and I can freshen it up in weekend. But I wouldn't mess with the bottom half if it's not giving you a reason to.
Aluminum heads are a nice upgrade. Custom cam. That's about all I'd do myself. If you stick with the stock heads, seals and springs are probably wise.
Don't expect to fix that rear main seal leak, though. After many attempts, I've decided it's just the way she marks her territory.