Howdy Back Lathi:
Yes, but this was pre-CI. I used a Comp 260 cam and a Clifford header. I had the header HPC coated. It was a single exhaust system with a 2" pipe and DynoMax turbo type muffler. This has been a few years ago and I do not know if Clifford is still in the header business. The last number I had for them was 1-888-471-1161. Last web contact was cliffordperformance.net. Clifford went through the same process that Classic Inline is going through now, when the patriarch, Jack Clifford died and family sort of took over the business.
I selected the cam based on flow hence data and intended uses. With a OEM log head, even modified like mine lifts past about .425" are wasted efforts. FYI my head was ported and the exhaust ports and combustion chambers polished. I used stock 1.75 intake valves with a 30 degree back-cut and 144 intake valves for exhaust at 1.468". Note- I did not know about the SI 1.50" exhaust valve availability at that time. It was also modified for a direct mount 2 barrel carb. It was milled .070" to attain a 9.75:1 CR. (I'm at 5,000 Ft El).
FYI- in addition to compensating for the thicker, modern composite head gaskets and a performance/economy goal of 9:1 CR, milling the head also drops the valves slightly deeper into the chambers, lessening shrouding and improving flow. For example, if you were to mill a head .075", .025" would accommodate for the thicker head gasket. The other .050" would equate to .050" increase in valve lift. So, assuming a stock cam lift of .348", the effective lift would now be .050" greater. Note- this is not the same as lift, but the effect is the same, without the added stress on rockers, rocker shaft, valve springs and valve seats. In the end, milling not only effect CR but also flow.
Current thinking is that the Comp 260 is old school and that since then cam technology and design specifically for our Ford sixes has improved. However, I'm hearing of folks still using the Comp 260 for a moderate street cam with satisfaction. We do know that Mike (CI) did a lot of work with Clay Smith Cams to come up with the CI line of cams.
I hope this is helpful to you. Keep us posted on your process and keep the questions coming.
Adios, David