Stoch turbo mod?

Hi chaps, would appreciate any help on this. Was gutted the other day when I found out my TT manual has turbos exh housings from an auto (.54). Seems most used import motors here in South Africa are autos these days, so anyway I pulled out all my 200sx turbo spares on the bench and did some head scratching. I know the 300 manual turbos are AR .62 4 bolt pattern and the 200 sx s13 T25 are AR .64 5 bolt pattern. Both the 300 and 200 have .48 compressor sides. If I mated the .64 from the 200 sx to the 300 .48 comp from the 300 would there be a shit load of lag or would the slight difference between the .62 and .64 exh housings be minimal?

TIA