If you look at an SC300 shifter for the R154, you will see that it has much more of a pronounced 'kink' in it. That is to move the shifter to the rear about an 1" or so. The one in your link is for a MKIII supra and you would have to notch out the front of our shifter mount location to get it to fit. Also, it would probably come pretty close to the radio/dash in 1st gear!
Well, you remember how much different the shifter was that you sold me in terms of the kink. After looking at the one in the link, it looks just like the one for MKIII Supra. I see that a guy with an SC300 said it works, but only a test will telli wonder if it would work on my application..... hmmm.. i still need to see how my stock shifter fits.