You got ahold of the early 83-85 1200 cover then. The 86 and on will work fine. I do have a few of the early coil spring clutch setups that work under that cover and are good conversions like the barnett (use HD barnett springs).
If you have that old engine with the 6 coil springs, get the HD barnett springs for the venture (83-85) and swap over the inner basket, outer pressure plate, and short push rod and you will be in business.
Sean