BigMacTobz

ok so guys, i got my ke70 using it as a daily with the 4k in it... then all of a sudden i saw a ca18 for sale on facebook ecu and loom for $300 and I'm all like wicked ill take it... then I'm like hmmm better do this right to make this car a real beast, i am in need of some advice so I'm not too keen on getting a r31 or hilux diff custom made up to fit in the rear, is there anyway i can just change to discs with out changing diff i know i probably can more asking what stuff ill need from what car and all that :) thankyou Big Mac