I just had a sump in the tank, no holes to baffle. It was OK on the street but on the track (road course) I had to run over half a tank for a good run and below a quarter it was horrible, only ran in the straights.
For the surge tank I used the mothod in the JTR manual. Secondary pump runs all the time but I can hardly hear it over the exhaust Lines run as follows, tank outlet to secondary pump to inlet on surge tank (at the top of the tank) outlet from the bottom of the surge tank to the fuel injection pump, to fuel rail on lt-1, return line from fuel injection rail to surge tank, return line from top of surge tank to the return line in the main tank. Hope that helps
If the car was not used on the track I think I woould have been OK without the surge tank. Mark