I like my Diaphragm clutch and mechanical linkage. Adjustments are few.
I did not like the od box; Second sucked until I installed 4.10s. But then first sucked worse. Third was direct and with 4.10s wasn't too bad. 4.30s were better.I found the splits were just too far apart for a high-reving engine. I had a hi-Compression 360 with a 223* cam at that time.
If your cam is 230* or more, then a regular box would be my choice. Since you have a 360, they will pull 3.55s ok with a clutch.The clutched-360 will also pull 3.23s but then the 3.09 low gear SET from a 65 Barracuda puts the snap back into first gear. I converted mine to a longtail,and put the shifter between the buckets; one of my better ideas.
The nice thing about the 8.75 is that you can have several chunks set up and ready to go. A swap-over is only about 1.5 hours on your back in the driveway. A lot less on a hoist.
