Custom tone rings can be made to make the VSS happy, but I think its a PITA. What year is your TBI puter? Chevy didnt start using VSS until 1991 so you might be able to use a different puter. Another option is to reprogram it to eliminate the VSS. I dont have the slightest clue how this works but I had it removed on my 8.1 and it runs like a raped ape so take that for what its worth.