What's Next for my Z1?

Howdy all.
I've been a member here since I bought my Z1 a few years ago and appreciate having somewhere to find my questions already answered.

I bought the bike from the original owner who had already done a significant number of period modifications and have tried to stay true to what you'd see on a 70's street racer. Everything I've done so far can be reversed to stock.

I'm trying to decide what the next step is in upgrading my Z1.
Currently it's on a relatively fresh 1st-over bore with new top end.

I've narrowed my options as far as what is next to two main ones:
-replace progressive springs with Race-Tech setup (springs + emulators) as well as upgrade the rear shocks (S&W to ohlins?)
-port and polished head: If I were to do this I would find a second head to do all the work to so that I could keep the current one as it is

Z1 heads are getting awfully expensive so were I to go that route I'd opt for modifying a KZ1000 piece. Anyone have any suggestions?

Eventually I'd like to find a second frame that I can brace.

here's some pictures so you can see what's been done already:

Love the fairing and the rear sets. Can i ask were did you get them.

The fairing is an original rickman that came with brackets for a Z1 frame. They pop up on ebay occasionally.

The rear-sets are tarozzi

As a rider, I'd go for the suspension upgrades. They will make a much bigger impact than a ported head, but they will also magnify the wibbly-wobbly nature of the frame. Still, in the corner is where you will surprise your mates.

That is one sweet looking ride there! I agree with getting the suspension and brakes settled first, power last. If the bike won't stop or handle, all the power goes to an ill handling, non stopping bike.

Very nice bike !!!!!!!
Love the fairing too . I want one !!!!
Shocks make sense . Ohlins or give Nils at Restocycle a call .
His ad appears at the top of each page.
He can make shocks up to fit your needs and they will look period correct
Dave

Funny story about the fairing...
I was deployed to afghanistan at the time and saw that there was both a full rickman fairing (with Z1 brackets) as well as the 1/2 rickman fairing (with Z1 brackets). Since I couldn't reliably get to a computer, I put a bid on both in hopes that I'd win one... well go figure I won both. Thankfully I have friends who are willing to store large boxes for me.

Thanks for the tip on the Ohlins.

On a side note, for those who've done emulator cartridges on their Z1's, these are the proper directions for machining correct?:
racetech.com/page/title/DRod%202-2%20KAW%20KX250%201974

I may buy a second set of damping rods so I can just swap them over.