Planning on picking up a can and doing this tonight.
EDIT:
Just did it!!! Not joking right now, that was the BEST $8.99 i've ever spent! Half the can through the vac line (don't forget pliers to get the clamp off), shut her off, started her back up after 15ish min of sitting and for a good ten minutes or so I had some thick smoke coming out! Put the second half of the can in the gas tank. Drove her home pretty hard, redlined through 1st and 2nd on one pull and the shifts were beyond smooth, no lie. You should also see how smooth it idles, it's ridiculous, needle doesn't even move from 750rpm.
GO SEAFOAM!