To be honest, gear drives are no good for anything other than making noise to impress someone. The only REAL, quality set-up that actually improves anything is the single idler types that require a special timing cover, and are a pita to do correctly, or the sets that have only the two gears, where the cam gear meshes directly with the crank gear. The floating, dual idler set-ups are not reliable, and usually create timing issues.
Imho, I'd stay with the tried & true Cloyes double roller chain/gear set. 

You're right, had to entertain the option tho. I ended up with the Cloyes double roller and a new timing chain cover. I have all the parts and will have it running this weekend. Can't wait. 

Had a gear drive in my engine for awhile, got tired of people telling me my power steering pumpwas bad. I still have it, Pete Jackson.

So I got the Cam/Lifters and heads installed and the motor is back together. Started on first try. When I pulled the pan I did not remove the starter, I just removed all the bolts for the inspection cover so I could get the pan down. That left the inspection cover hanging while I cleaned the pan and installed the cam, etc.. When I was rolling the motor over while adjusting the valves I could hear what I thought was the flywheel rubbing against that dangling inspection plate. Nothing major since I was manually rolling the motor over and I figured that would be gone once I buttoned up the oil pan and reinstalled the inspection cover bolts. 

Found the problem. When I tried to cut some time by leaving the starter in and the inspection plate hanging I bent the inside flange on the inspection plate when I was adjusting the valves. When I bolted the plate back on it allowed the crank flange to hit the bent part of the inspection plate creating that terrible noise. Pulled it apart, cleaned and repaired and painted the inspection plate and I'm done except for the hood. Just ran the cam in at 2k rpm for 20 minutes and then put 150 miles on the new cam at highway speeds. Great to be back on the road. Also the borgeson upgrade is worth every penny spent. @f4gary I have reconsidered the roller cam and would def spend the extra cash for the sake of breakin worries. I used a ton of assembly lube and breakin lube as well as Chevys OES supplement recommended by edelbrock. Fingers crossed. It's done right. Take care and thanks Pat

apesa63:  I enjoyed reading your account of diagnosing and rebuilding your engine. Glad you are rock'n and roll'in again!  Thanks for sharing with us.