more power from t 1g-gte

i recently had to replace the 1g-gteu in my 81 hilux caus the turbo's decieded to give up the gost, and i found that the new engine isnt as powerful as i would like as it has the stock c12 turbos on it and my old engine had turboloader k-24's, does anyone know of a good cheap way to get more power out of the stock turbos without to much trouble