You might have just bandaided the real issue. It's possible there's too much fuel pressure now or the carby might need a rebuild anyway.
Get a rebuild kit off ebay and follow some of my earlier threads about the RB30 carby rebuild or
get the carby professionally rebuilt. You can also get a brand new carby for around $400 from ebay.
Replace the fuel filter if you haven't done that already. Get a fuel pressure/vacuum tester and test the fuel pressure.
Also test the fuel return switch/valve as well. Patrol manual(Haynes) can guide you how to do the fuel pressure/fuel return switch, etc tests. Download the manual from this forum.
http://www.ebay.com.au/itm/CARBURETT...4AAOSwBahVMd~T
http://www.ebay.com.au/itm/CARBURETT...oAAOSw9r1WDRI5
http://www.ebay.com.au/itm/10-PSI-Ca...wAAOSwo6lWJJky