That is the epitaph of a 750 SF: Duel Front Discs, Letter Box Seat with working Air Filters using PF's and Spoke Borraini Rims - Plus added Brev Bars. Definitely 73 pipes.
NO Rear Sets - Rear Sets are only useful for String Beans like me ;o)
I'm not getting into Valve Diameters, Dynamic Compression ratios and Cams.
Other then I think you should look into P.Kelley's Dynamic Compression Ratio Software for Windows.
Here: http://cochise.uia.net/pkelley2/DynamicCR.html
Harold Brockshire of Cam Dynamyics, in my opinion, designed the BEST Cams for whatever Company he worked for. Specific Lunati.
R.I.P Harold _ My internet friend when I was racing or rebuilding. Harold was a cam profile Genius.
Do not forget it was Grumpy Jenkins that designed the optimum Valve Seat angles into and out of a port.
Between Harold and Grumpy - Works for Every Thing when you want to win a Race ;o)
CORRECTION: Sorry Harold founded a Cam Co with the name something like Enhidryne and did not console Cam Dynamics.
Correct me ;o)