If your on a budget id just go for the performer. I ran one for a long time and it worked great. As for a convertor im not as sure since i havent done one personally since mine is a 5spd car. But with a stock motor with those things do as a safe bet though a 2000-2500 stall. If i recall correctly the stock stall is around 1500-1700 so that would give you a nice improvement.
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