A Performer intake is slightly better than the stock and weights less. With a 1/2- 1" spacer that intake wakes up. Don't remember the # but the one that fits the 360 will work.
I don't think you are thinking about the Performer. It's not better than stock and there is exactly one Performer intake, there isn't another "that fits the 360". The Performer fits all the LA's and has port sizing a bit smaller than the stock 4bbl intake. Other than being lighter the stock intake is a better choice as is.
