Most sandwitch type oil cooler adaptors cool the oil BEFORE it is run through the filter, You want to make sure you use FILTERED oil to supply oil to your turbo. You can do this with a Tii filter housing and a sandwitch type cooler adaptor or just pull the stock housing off your engine and drill and tap in the same place on the housing the Tii injection pump oil line is mounted. You can then just make it a 1/8 NPT and use an AN (Aeroquip etc) line to the turbo.
If all you are doing is drag racing you don't really need an oil cooler, at most you will be at full power less than 13 seconds and then you have time to let things cool down. You would be much better off making sure you have enough Water Radiator to keep it cool.