YES! The credit goes to Jim as he told me about his friend and for $80. plius $10. for 3 day shipping I got a beautiful 70mm SC pulley. Combined with the 178mm crank pulley I have it is a bit more than if I had a 62mm SC pulley. FYI take the crank pulley diameter, divide that by the diameter of the SC pulley and multiply that number times the engine RPM to get the rpm of the SC rollers. This is only a refferrence as the rollers spin at a ratio near 3 times the engine rpm but it gives a number to compare to. I had the 65mm SC pulley nand wanted some more boost than that but wanted to stay within the efficiency range of the SC. That is where Jim stepped in as I found I could go from 67 to 73mm's for the pulley diameter. My calculations showed a 6.6% increase. Well either my ebay used SL55 pump was dying or it could not keep up at rpm's above 5300rpm, it would go VERY lean. 550cc injectors, new Bosch for just $225. did the trick along with the adjustable regulator. My tune is for 450cc injectors with extra fuel from when I was running TORCO. I adjust the AFR's to run a safe amount of fuel.
A search for machining the SC pulley address will give you that info and a number to call with a name. Highly recommend him. In fact I would go with a 67mm pulley instead of the 65mm pulley available as it is quite a savings. Mark