Camshaft Gear Drives

[roverv8]

How much better is a gear drive going to be for accurate cam timing compared to a good true roller duplex replacement and what are the differences in the gear drives (ie) idlers etc.

 

[Windsor377]

I'm sure, in the end, it will depend on the belt, but I can tell you we've got a combination that may be helpful for comparison purposes.

It is, however OHV and 2 valves per cylinder. Still the valve springs are 300lb on the seat and 875lb open at .754"

I'm assuming your 260 on the seat and close to 800 open for a pair of springs?