Joe and did it at the same time. The 1100 heads are identical to 1000 heads as far as valving and ports. He used what he had with early cams. The 1100 heads are not immediately setup for ignition off the left rear. Read Joe’s build for his he did it.
I have PowerArc ignition off the crank, same as C5 except C5 is off the cam. PowerArc makes C5. What I showed above shows they’re pretty much the same, a little bigger intake valve on the 1000/1100 heads, but I forgot to mention the stock 1200 cams have a little more valve lift on the exhaust side. Joe also had a custom curve for his from Paul. Mine is a cb750 curve. I need to buy the cord and tweak it.
The other difference in our bikes is carburation. Joe’s is a 2bbl Progressive Weber clone. Mine are currently v65 carbs, a little bigger than 1200 carbs but the same design.
It’s possible the single carb is better for the build. The cylinders fire 1-3-2-4 so with four carbs or dual Webers each venturi will get a pulse and then delay three turns. With a single carb and a VW plenum (Progressive or single throat)there is a constant movement of air through the Venturi(s). This may help in filling cylinders.
I have decided to try the dual Progressive carbs, but I really think a properly set up two barrel could be better.