We worked hard on designing what we feel is the most universal user friendly small block jackshaft on the market. It fits on top of your mount between the mount and engine. You will need 3/4” longer bolts. Includes plate, block, bearings and 3/4” shaft, 2 sprockets and spacers. Choose 2 sprockets from 13, 14, 15, 16, 17, 18, 20. 
There are many benefits to going to the jackshaft:
• Reduced maintenance
• Use a 13T and bigger clutch drivers with a bearing eliminating the need to grease the bushing that fails easily anyway
o Extends clutch driver life dramatically due to a reduction in tooth pressure
• Simple to lube the chains between each time on track
• Reduced engine fatigue
• By running the larger tooth count sprocket you run the sprocket inboard closest to the side cover bearing and reduce the leverage of the drive point flexing the crankshaft
• Increased rear sprocket clearance by being able to use smaller rear sprockets and still get the desired ratio
• Unlimited ratios available as low as 9.3 using a 65T rear sprocket
• can run chains with less tension creating less drag