UPDATE on this project:
I replaced the orignal 17k Precision LNB and feedhorn with a WSI DMX242 that I had on hand. I set the foc length to 38 after calculating the f/d for the dish. The mesh on this 7.5ft dish is triangular openings, not small circles like I have seen on others. It looks a lot like the SAMI pictures on their website and matches diameter focal depth and dish depth, but I could find nothing to confirm the brand.
I removed my 5ft echostar C Band from it's pole by myself and parked it behind the garage for free to someone who wants it like it was given to me.
I have attached a few pictures of my rube goldberg settup for easy installation of the 7.5ft dish on my old 3 1/2" pole... grabbed my neighbor at his convenience, gave him a pair of gloves and the two of us stepped up from two lawn chairs (not in pic) onto my two wooden ramps placed across 4 SEARS cheopo sawhorses. Plopped it onto the pipe and said thank you to the neighbor (5 min). Grabbed my inclinomator and meter and set the polar angle for my latitude. Hooked my meter up and swung the dish left and right from my due South of 118.7W (Anik F3) and nothing.... stepped back and stared at it for awhile... raised the elevation a couple degrees (looked low) and BANG! Nice solid signal on the wrong sat. I was on 121W. (My Superbuddy overcomes my igorance most of the time by telling me what sat I'm on). Then I realized I still had to connect the old Actuator. It is a very solid 2" diameter and 24" arm. I had cut my new wire to the old actuator on the 5ft so I didn't have to open it up.
Wired up my VBox, but had to open the actuator to see what color wires were wired to what. The motor wires are always easy as they e the heavier wires.
I then went in the house and fired up the VBox and my OpenBox S9 and I had 70% quality of ANIK F3 @118.7W. I spent the next few hrs playing with find satellites on the arc and seeing what channels it picked up. I am averaging 70% quality on most sat's from 87W to 135W. I still have tweaking of the LNB and adjustment of the arc to do yet, but after I reset the VBox when sitting on my East sat and storing most C Band sat's from 87W to 135W and was amazed at the speed of the VENTURE 24" ACTUATOR speed! It is very fast compared to my old STAB 120 Horiz to Horiz KU motor. That big dish moves like greased lightening.
Third time, Toucan: Thanks for the tip on the Craig's list dish.